UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 2004

or

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ___________ to __________

Commission file number: 0-22494

AMERISTAR CASINOS, INC.

3773 Howard Hughes Parkway
Suite 490 South
Las Vegas, Nevada 89109
(Address of Principal Executive Offices)

Registrant’s Telephone Number, including area code: (702) 567-7000

Securities registered pursuant to Section 12(b) of the Act:
None
(Title of Class)

Securities registered pursuant to Section 12(g) of the Act:
Common Stock, $.01 par value
(Title of Class)

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes þ No o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§ 229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. þ

Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Securities Exchange Act of 1934). Yes þ No o

State the aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, or the average bid and asked price of such common equity, as of the last business day of the registrant’s most recently-completed second fiscal quarter: approximately $386,938,445, based on the last reported sale price of the registrant’s Common Stock on the Nasdaq National Market on June 30, 2004.

As of March 1, 2005, 27,736,281 shares of Common Stock of the registrant were outstanding.

Portions of the registrant’s definitive Proxy Statement for its June 17, 2005 Annual Meeting of Stockholders (which has not been filed as of the date of this filing) are incorporated by reference into Part III.

TABLE OF CONTENTS

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     Unless the context indicates otherwise, all references in this Report to “Ameristar” or “ACI” refer to Ameristar Casinos, Inc. and all references to the “Company,” “we,” “our,” “ours” or “us” refer to Ameristar and its consolidated subsidiaries. This Report contains certain forward-looking statements, including management’s plans and objectives for our business, operations and financial performance. These forward-looking statements generally can be identified by the context of the statement or the use of forward-looking terminology, such as “believes,” “estimates,” “anticipates,” “intends,” “expects,” “plans,” “is confident that” or words of similar meaning, with reference to us or our management. Similarly, statements that describe our future plans, objectives, strategies, financial results, financial position, operational expectations or goals are forward-looking statements. Although management believes that the assumptions underlying the forward-looking statements are reasonable, these assumptions and the forward-looking statements are subject to various factors, risks and uncertainties, many of which are beyond our control. Accordingly, actual results could differ materially from those contemplated by any forward-looking statements. In addition to the other cautionary statements relating to certain forward-looking statements throughout this Report, attention is directed to “Item 1. Business — Risk Factors” and “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” for a discussion of some of the factors, risks and uncertainties that could materially affect the outcome of future results contemplated by forward-looking statements.

     You should also be aware that while we communicate from time to time with securities analysts, we do not disclose to them any material non-public information, internal forecasts or other confidential business information. Therefore, you should not assume that we agree with any statement or report issued by any analyst, irrespective of the content of the statement or report. To the extent that reports issued by securities analysts contain projections, forecasts or opinions, those reports are not our responsibility.

PART I

Item 1. Business

Introduction

     We are a leading developer, owner and operator of casinos and related entertainment facilities in local and regional markets. Our seven properties in six markets exemplify the highest quality in design and construction and offer outstanding dining, lodging and entertainment options along with the most current gaming technology. Our strategy focuses on providing a dynamic total casino-entertainment experience and achieving a market-leading position in each of our markets.

     Our casinos include the most spacious floors and typically have the greatest number of games in our markets. Our properties emphasize slot play and feature state-of-the-art slot machines, virtually all of which incorporate convenient ticket-in, ticket-out technology, and the newest multi-coin nickel and penny denomination games. We also offer a wide range of popular table games, including blackjack, craps and roulette, and live poker in the majority of our markets. We generally emphasize competitive minimum and maximum betting limits based on each market. Our gaming revenues are derived, and we expect them to continue to be derived, from a broad base of customers, and we do not depend upon high-stakes players. We extend credit to our

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Mississippi and Nevada gaming customers only in limited circumstances and limited amounts on a short-term basis and in accordance with the credit restrictions imposed by gaming regulatory authorities. The issuance of casino credit is prohibited in Missouri, Iowa and Colorado.

     We offer a greater variety of dining choices than the other casinos in our markets. Our signature restaurant concepts include warm and intimate steakhouses, elaborate buffets with interactive display cooking and 24-hour casual dining restaurants. In addition, our dynamic sports bars feature the most advanced audio-visual technology in their markets. The private Star Clubs offer our select Star Awards members an exclusive and comfortable place to relax at all Ameristar-branded properties.

     Our total entertainment strategy includes a wide range of entertainment, showcasing live local, regional and national talent. Our major venues feature popular headliners in music and comedy, as well as professional boxing, while our highly themed Bottleneck Blues Bars and other showrooms set the stage for national and regional bands. Cabaret stages energize each of our casino floors with live entertainment.

     The following table presents selected statistical and other information concerning our properties as of January 31, 2005.

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     Ameristar St. Charles. The 74,000 square-foot porte-cochere at Ameristar St. Charles provides a stunning entry to this expansive facility. Once inside, a dramatic fountain welcomes guests to a historically-themed streetscape that opens onto a complete casino entertainment experience.

     The 130,000 square-foot casino floor ranks Ameristar St. Charles among the 15 largest state-licensed casinos in the U.S. The two-level gaming area feels spacious and open; it accommodates 3,293 slot and video poker machines and 87 table games, including a 12-table poker room.

     Seven restaurants offer a range of choices, such as the upscale 47 Port Street Grill steakhouse with exhibition cooking, chef’s tables and a private dining room; the chic King Cat Club martini bar; the Landmark Buffet with its multiple serving stations and intimate dining rooms named for local historic sites; and the Southern front-porch inspired Pearl’s Oyster Bar. The 24-hour Falcon Diner recreates the American diner with comfortable booths, a soda fountain and Art Deco architecture. The Diner is complemented by a gourmet pastry and coffee bar. The Bottleneck Blues Bar features Southern cuisine as well as live headline entertainment, set off by eclectic Delta blues club decor. Amerisports Bar & Grill boasts a 34-foot-long video wall and two high-tech, giant video screens, which complement the state-of-the-art audio-video system that includes booths customized with personal screens and speakers.

     Ameristar St. Charles was chosen as “Best Casino” by Riverfront Times for the last three years. The property also won 11 “Best of” Casino Player Awards and nine “Best of” Midwest Gaming Awards in 2004.

     We are currently designing a 300-room, all-suite hotel, approximately 20,000 square feet of meeting facilities, a new 1,300-seat entertainment pavilion and an additional parking garage at our St. Charles property. We have not yet completed a definitive project budget or schedule; however, we expect to begin construction in late 2005.

     The property is located immediately north of the Interstate 70 bridge over the Missouri River in the St. Louis metropolitan area, strategically situated to attract patrons from the St. Charles and greater St. Louis area, as well as tourists from outside the region. The property is also in close proximity to the new St. Charles convention facility. Interstate 70 is a 10-lane, east-west freeway offering easy accessibility to, and direct visibility of, the Ameristar St. Charles site.

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     Ameristar Kansas City. Our largest property, Ameristar Kansas City, ranks among the 10 largest state-licensed casino floors in the U.S. A $64 million investment in renovations and enhancements completed in September 2003 has created dramatic and comprehensive improvements to the property.

     The 140,000 square-foot casino floor offers a spacious layout and flow, along with open visibility from the streetscape. Further, the casino floor offers a high-limit area and poker room which is the largest in the Midwest. The casino features 3,003 slot and video poker machines and 107 table games.

     Dining at Ameristar Kansas City reflects our strategy to offer more choices: guests can select from 11 restaurants and nine bars/lounges. The Great Plains Cattle Co. has a unique Kansas City-inspired atmosphere. Bugatti’s Little Italy Café is recognized as a “Don’t Miss Dining Venue” in the Zagat Survey; it was recently completely remodeled and includes a renovated patio dining area. The 24-hour Falcon Diner mirrors our Ameristar St. Charles diner and serves great American favorites and desserts. At The Buffet, guests experience eight stations, from American (including barbeque and broiled steaks) to Italian cuisine. The Amerisports Brew Pub features state-of-the-art video and audio technology on 41 screens. The Brew Pub also features an exhibition brewery where customers can observe the production of Ameristar’s award-winning private label beers and choose from a variety of menu items. Casual dining options are available at an open-seating food court, where we lease space to three national brands: Burger King, Sbarro Pizza, and Cold Stone Creamery.

     The property also features a wide scope of entertainment options. The Star Pavilion seats approximately 1,400 guests and showcases headline entertainers and professional boxing. The distinctive and historically accurate Depot #9 Stage and Saloon, near the porte-cochere entrance to the property and connected to a historic Pullman railroad car, showcases local and regional bands. Finally, the casino cabaret provides nightly entertainment on the gaming floor.

     A 184-room hotel, as well as a state-of-the-art 18-screen movie theater complex, gift shop, video game arcade and Kids Quest activity center, complete the amenities at Ameristar Kansas City. All are easily accessible via ample surface parking or a climate-controlled walkway from a 2,650-space parking garage that was added in 2002. During the fourth quarter of 2004, we began a complete renovation of all the hotel rooms at our Kansas City property. We expect to complete the renovation during the third quarter of 2005.

     For the past three years, the facility has earned the Gold Award for “Best Casino” in Ingram’s Best of Business Edition and “Best Casino” in Kansas City Magazine’s “Best of Kansas City” readers’ poll, as well as 2003 and 2004 “Favorite Casino Hotel in Missouri” in Midwest Gaming and Travel and Casino Player Magazine.

     Located seven miles from downtown Kansas City, Missouri, Ameristar Kansas City is specifically designed to attract customers from the greater Kansas City area, as well as regional overnight guests. The property is in close proximity to the Interstate 435 bridge. Interstate 435 is a six-lane, north-south expressway offering easy access to, and direct visibility of, Ameristar Kansas City.

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     Ameristar Council Bluffs. Ameristar Council Bluffs features the largest riverboat and the most casino games in Iowa, comprising 38,500 square feet of gaming space with 1,567 slot machines and 39 table games.

     The Ameristar Hotel and Main Street Pavilion comprise the property’s landside facilities. The luxurious 160-room hotel, which is currently undergoing significant upgrades, includes 40 whirlpool guestrooms and suites, and has earned the American Automobile Association Four Diamond designation for the past seven years. It was the first riverboat casino hotel to earn this distinction, and it is currently one of only two AAA Four Diamond hotels in the Omaha metropolitan area. On land, guests also find the exclusive Star Club players’ lounge; the upscale Waterfront Grill steakhouse with its open fireplace and intimate setting; the Veranda Buffet with its multiple cooking stations; and the Prairie Mill Cafe & Bakery, a 24-hour specialty restaurant and fresh bakery and coffee bar.

     The Amerisports Bar and Cabaret offers dining and live entertainment, as well as 42 television screens, the largest of which is a 9’ by 12’ mega-screen. Other entertainment venues are the casino cabaret and the Star Arena, a scenic 2,850-seat amphitheater — and the city’s only outdoor riverfront entertainment venue — on the bank of the Missouri River. Other amenities include a Kids Quest activity center, fitness facility, indoor pool, gift shop, an ice cream and sweet shop and convention space.

     The Waterfront Grill has been named one of the Omaha area’s top-10 restaurants by the Omaha World-Herald. The property won 20 “Best of” Casino Player Awards, as well as 12 “Best of” Midwest Gaming Awards, in 2004.

     During the fourth quarter of 2004, we began a complete renovation of all the hotel rooms at our Council Bluffs property. We expect to complete the renovation of the rooms during the second quarter of 2005. Additionally, we are currently undertaking a major redesign and renovation of the Veranda Buffet to make it more upscale, create display-cooking stations and increase capacity to 340 guests. On completion, which is expected to occur in the second quarter of 2005, we will rebrand the buffet venue as the Heritage Buffet.

     We anticipate expanding the gaming space to accommodate an additional 300 slot machines and a spacious, upscale poker room. Completion of the gaming space expansion is currently estimated to occur in the second quarter of 2006.

     Located across the Missouri River from Omaha, the property is adjacent to the Nebraska Avenue exit on Interstate 29, immediately north of the junction of Interstate 29 and Interstate 80.

     Ameristar Vicksburg. Ameristar Vicksburg has been the long-time market leader, attributable to its superior location, premier product quality and outstanding dining and entertainment options.

     The three-level dockside casino is significantly wider than other riverboat casinos in our market, providing a spacious feel. The casino features 42,000 square feet of gaming space, with 1,364 new-generation slot machines and 36 table games.

     The Bottleneck Blues Bar, which is a Delta-style blues club with live entertainment and gaming, and the Casino Cabaret round out the property’s entertainment offerings. Both venues feature at least two groups performing nightly.

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     Restaurants include the upscale Waterfront Grill, overlooking the Mississippi River, and the Bottleneck Blues Bar Express Café, with regionally influenced express-service menu selections. In December 2003, we completed a $9 million buffet and kitchen renovation, re-branding the 400-seat venue as the Heritage Buffet, which features seven specialty food stations along with private meeting facilities with audio/visual capabilities.

     The 150-room hotel at Ameristar Vicksburg earned a Three Diamond rating from the American Automobile Association, and the property received the city’s most “Best of” Casino Player Awards in 2004.

     In 2005, we intend to expand the property’s gaming space to accommodate an increase of 200 slot machines and a poker room.

     Ameristar Vicksburg recently filed a zoning application seeking a height variance for a master-planned parking garage and new hotel adjacent to the casino. If zoning approval is received, the first phase of construction is planned to consist of the parking garage, with space for approximately 1,150 vehicles. Hotel construction is expected to follow in multiple phases. The hotel plans include additional dining and meeting rooms, retail space and a swimming pool. We are awaiting approval of the zoning variance before we proceed with developing specific details on the design, timing or cost of the proposed projects.

     Ameristar Vicksburg is located one-quarter mile north of Interstate 20 in Vicksburg, Mississippi. The property is visible from the highway exit ramp and is the closest casino to I-20, a major east-west thoroughfare that connects Atlanta and Dallas. It caters primarily to guests from the Vicksburg and Jackson, Mississippi and Monroe, Louisiana areas. The nearby Vicksburg National Military Park attracts more than one million visitors annually.

     In February 2005, we signed an agreement to purchase 4.2 acres of property adjacent to our existing hotel. The property fronts on Washington Street and can be used for further expansion of our non-gaming amenities.

     Mountain High Casino. We acquired Mountain High Casino in Black Hawk, Colorado on December 21, 2004. It is one of the largest casinos in Colorado and the acquisition adds to our geographic diversification.

     The property offers 57,000 square feet for gaming, with approximately 1,200 slot machines and 24 table games (including poker). By law, Colorado casinos may only offer slot machines, blackjack and poker and no single wager may exceed $5. Other amenities at the property include an upscale steak and seafood restaurant, a seven-station buffet, a food court with grill and stone-fired pizza venues, and Starbucks Coffee Bar. The parking garage offers space for approximately 800 vehicles, with 650 additional valet spaces.

     We intend to invest approximately $140 million in capital expenditures to improve the competitiveness of the property. The planned capital improvements include reconfiguring and expanding the gaming area, introducing cashless slot technology and other gaming equipment upgrades, constructing a 300-room AAA Four Diamond-quality hotel and additional covered parking, upgrading the food and beverage outlets and adding a casual dining restaurant. All of these improvements are expected to be completed during 2005, with the exception of the hotel,

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which is expected to be completed by mid-2007. We plan to rebrand the property as Ameristar Black Hawk once the first phase of enhancements is complete.

     Mountain High Casino is located in the center of the Black Hawk gaming district, approximately 40 miles west of Denver, Colorado, and caters primarily to patrons from the Denver metropolitan area.

     The Jackpot Properties. Cactus Petes Resort Casino and The Horseshu Hotel & Casino are both located in Jackpot, Nevada, just south of the Idaho border. The Jackpot properties have been operating since 1956, and embody our cornerstone values of superior product quality, premier amenities and exciting entertainment.

     Together, the Jackpot properties feature approximately 29,000 square feet of gaming space with 1,013 slot machines and 29 table games, including poker, as well as a sports book.

     The properties’ resort amenities include 420 hotel rooms, with 30 deluxe hot-tub suites; an Olympic-sized pool and heated spa; a styling salon; lighted tennis courts; a recreational vehicle park; and access to a nearby 18-hole golf course. In addition, a general store and a service station serve guests and regional travelers. Dining selections include an extensive buffet, The Plateau Room fine dining restaurant, a 24-hour casual dining restaurant and a Pizza Hut. We will also be opening a casual Mexican grill, Pancho Villa, at the Horseshu in March 2005. Cactus Petes’ Gala Showroom features nationally known entertainment.

     Cactus Petes and The Horseshu have long held Four Diamond and Three Diamond ratings, respectively, from the American Automobile Association; Cactus Petes has been named “Best Hotel/Resort” in rural Nevada for seven consecutive years since 1998 by Nevada Magazine.

     The properties are located on Nevada State Highway 93, a major regional north-south route, and serve customers primarily from Idaho, and secondarily from Oregon, Washington, Montana, northern California and the southwestern Canadian provinces.

Our Business Strategies

     Our key business strategies are: (1) to develop the highest quality facilities in our markets with a wide range of amenities; (2) to lead our markets in slot technology; (3) to emphasize branding and marketing; and (4) to employ efficient, hands-on management. These strategies are designed to create a complete entertainment experience and provide courteous and efficient service that meets or exceeds our customers’ expectations.

     The core components of our business strategies are as follows:

     High Quality Facilities; Diverse Range of Amenities

     We believe we have designed and built the highest quality state-of-the-art facilities in each of the markets in which we operate. Inherent in our project development process is the effective collaboration, coordination and cooperation of our operations and design/construction teams. As a result, our facilities are of superior quality and include cutting-edge technology, which provides our guests with an exciting and complete entertainment experience. We believe our newly acquired Mountain High Casino will be of a comparable quality and design level as our other properties once we complete our planned capital improvements.

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     We believe the number and diversity of our amenities is key to attracting customers and developing repeat business. We seek to broaden our appeal by offering more amenities than our competition. We believe that more choices attract more types of customers. Our properties offer restaurants ranging from casual to upscale, and customers can choose from entertainment options ranging from cabaret lounges and sports bars to outdoor amphitheaters and multipurpose entertainment pavilions. Some examples of our non-gaming amenities that have proven successful are our high-tech Amerisports Bars (Council Bluffs, St. Charles and Kansas City), our signature steakhouses (Company-wide), the Falcon Diner (St. Charles and Kansas City) and our unique Bottleneck Blues Bars (Vicksburg and St. Charles). In addition, our properties regularly feature nationally known entertainers, including Paul Anka, the Beach Boys, Pat Benatar, Michael Bolton, the Doobie Brothers, Heart, Julio Iglesias, BB King, Lonestar, Martina McBride, Bob Newhart, LeAnn Rimes, Kenny Rogers, Sinbad, Randy Travis and Dionne Warwick.

     Leading Our Markets in Slot Technology

     Slot machines are the core driver of our casino business. We believe that leading our markets in slot machine trends is essential to our success. The most significant innovation in slots today is ticket-in, ticket-out, which creates a more convenient coinless gambling experience for our customers and increases the revenue we earn on each machine. We led our markets in the introduction of this technology and currently approximately 97% of the slot machines at our Ameristar-branded properties have ticket-in, ticket-out capability. We were also the first operator in our markets to introduce a large supply of new-generation nickel and penny video reel slot machines. Although many of our competitors now offer these machines, we believe that we gained a significant competitive advantage by leading this trend. We also continue to focus on the most appropriate product mix. We continually analyze slot utilization and slot machine win per unit to determine the most profitable slot machine mix.

     Branding and Marketing

     Our branding and marketing efforts are designed to support each of our properties as the number one casino and entertainment destination in their respective markets. Our multi-tiered players’ clubs are designed to identify and reward guests based on their level of play. Our best players receive enhanced personalized service and additional benefits through our hosting and ambassador teams. We communicate our entertainment and promotional activities to our guests through targeted direct mail as well as traditional media channels (television, print, radio and outdoor advertising).

     Hands-on Management

     Since the inception of the Company, we have developed a number of “best practice” processes and strategies for our operations. We believe we have enhanced our revenues and minimized our costs by practicing a hands-on management approach at the property and corporate levels. To fully benefit from this management style, we also build into our processes a high level of collaboration and communication among our seven properties and corporate team. Working together permits us to continually refine these processes and at the same time more efficiently manage our business. We have centralized the strategic aspects of operations, marketing, food and beverage, hotel and gaming. In administration, we have centralized many aspects of purchasing, payroll, human resources, information technology and other departments. The centralization of these strategic functions allows our properties to focus on the tactical aspects of our business, including

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guest service, player development, team member relations, food quality, etc.

Future Expansion

     We continually evaluate opportunities to expand our operations through a variety of means, including entering new North American or overseas markets created by the legalization or expansion of casino gaming, developing new casinos or buying existing casinos in established North American casino gaming markets and expanding through continued growth at our existing properties. Although our preference is to own and operate each of our gaming properties, we may also consider expansion opportunities involving management contracts or joint ventures.

     We continue to explore expansion opportunities in the United Kingdom in anticipation of the expected reform of that country’s casino gaming laws that would allow large-scale modern casinos to be developed in a limited number of locations throughout the United Kingdom. Primary reform legislation is pending in Parliament, although we have no assurance as to whether or when legislation will be enacted. The development of modern casinos would further require the adoption of planning and tax policies conducive to attract development, the formation of a new regulatory agency and the adoption of regulations.

     During 2004, the Commonwealth of Pennsylvania enacted legislation authorizing slot machines at pari-mutuel racetracks and a limited number of non-track locations in Pennsylvania, including at two sites to be selected in Philadelphia. We have acquired an option on a 46-acre site in Philadelphia and are pursuing a gaming license for that site.

     We continually review the operating performance of each of our existing properties and the feasibility of enhancing their performance through targeted capital expenditure programs. In doing so, we assess the anticipated relative costs and benefits of the projects under consideration, the availability of cash flows and debt financing to fund capital expenditures and competitive and other relevant factors.

Markets

     The following table presents a summary of the market characteristics and market performance of our Ameristar-branded properties as of December 31, 2004.

     Jackpot, Nevada is just across the border from the State of Idaho. The primary market area for the Jackpot Properties is Twin Falls (located approximately 45 miles north of Jackpot) and Boise (located approximately 150 miles from Jackpot). The primary market area comprises approximately 600,000 adults. The balance of the Jackpot properties’ customers comes primarily

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from the northwestern United States and southwestern Canada. As of December 31, 2004, the Jackpot properties had 64% of the slot machines and 72% of the table games in the Jackpot market.

     The Black Hawk-Central City gaming market is located approximately 40 miles west of Denver, Colorado. In 2004, this market generated $577.2 million in gaming revenues, accounting for 80% of the gaming revenues within the State of Colorado. Black Hawk, with 21 of the 28 casinos in the market, generated approximately 91% of the market’s gaming revenues in 2004. The primary trading areas for the Black Hawk-Central City market are residents from Denver, Boulder, Golden and Fort Collins, Colorado, as well as Wyoming and western Nebraska. Approximately 2.0 million adults reside within 50 miles of Black Hawk and over 2.8 million adults reside within 100 miles.

Competition

     St. Charles

     Ameristar St. Charles competes with four other gaming operations located in the metropolitan St. Louis area. Two of these competitors are located in the State of Illinois. Unlike the State of Missouri, Illinois does not impose a $500 per person buy-in limit, does not require a casino-issued identification card to enter a casino and allows credit play. However, Illinois casinos are limited in the number of gaming positions allowed and are subject to a higher rate of gaming taxes than Missouri casinos. In the third quarter of 2004, our principal competitor completed an $80 million expansion, which included an additional 300-room hotel tower, the addition of two new restaurants, as well as several other non-gaming amenities. There were no other major capital improvements or expansions in the St. Louis market in 2004.

     The St. Louis gaming market is currently insulated from other casino gaming markets. In the third quarter of 2004, the Missouri Gaming Commission prioritized for investigation a gaming license application for a new casino license located in Lemay, in the southeastern portion of St. Louis County. The proposed $300 million development would consist of a 75,000 square foot casino, 200-room hotel and 2,000 parking spaces and is slated for completion in late 2006. At the same time, the Missouri Gaming Commission prioritized for investigation a gaming license application by the same developer for a new facility at Laclede’s Landing in downtown St. Louis. The proposed $250 million development would consist of a 90,000 square foot casino, 100-room hotel and 5,200 parking spaces and is projected to open in late 2007. In October 2004, another operator agreed to purchase the existing President Casino located in downtown St. Louis. The new owner of the President has announced plans to enhance the current facility. The Alton Belle Casino in Alton, Illinois, across the Mississippi River from downtown St. Louis, is expected to undergo a change in control in connection with the acquisition of its parent company by another gaming company, which acquisition is expected to close in mid-2005. The acquiring company has not announced plans for any changes it may make at the Alton Belle. The addition of two gaming licenses in the St. Louis market, as well as any replacement or upgrade to the President or Alton Belle casinos, would result in additional competition for Ameristar St. Charles. The State of Illinois has one dormant gaming license that it has announced it intends to reissue in the greater Chicago area. Accordingly, we do not anticipate any new competition in the Illinois portion of the St. Louis market.

     Kansas City

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     Ameristar Kansas City competes with three other gaming operations located in and around Kansas City, Missouri. In December 2003, Argosy Casino, located approximately 13 miles from Ameristar Kansas City, replaced its existing three-level casino riverboat with a single-level, 62,000 square foot barge-based facility. Additionally, Argosy is currently constructing a hotel and replacing its parking garage. In 2004, Argosy increased its market share at the expense of our other two competitors in the Kansas City market. Our primary competitor is in the process of completing a $107 million renovation which will include 206 additional rooms, new restaurants, an expanded parking area and several new non-gaming amenities. The project is expected to be completed in the third quarter of 2005. The remaining competitors did not have any major capital improvements or expansions in 2004.

     The Kansas City market is currently insulated from other casino gaming markets, with no competing markets within 50 miles. However, see “Risk Factors” for information concerning current proposals to legalize casino gaming in or near Kansas City, Kansas, which is in close proximity to Ameristar Kansas City.

     Council Bluffs

     Ameristar Council Bluffs operates one of three gaming licenses issued for the Council Bluffs gaming market pursuant to an operating agreement with Iowa West Racing Association. The other competitors are operated by a single company and consist of another riverboat casino and a pari-mutuel racetrack casino, which currently only offers slot machines. In 2004, the operator of the competing riverboat casino completed an $8.5 million renovation of their hotel rooms and opened a new buffet. During the same period, the pari-mutuel racetrack casino opened a new VIP players’ lounge. In 2004, the Iowa legislature enacted a bill which permits the operation of table games and video poker at pari-mutuel racetracks. The competing racetrack casino is developing an $86 million expansion of their land-based facility, which will be rebranded and include a 93,000 square foot casino (inclusive of space for newly approved table games), a 1,200 space parking garage and several other non-gaming amenities. The project is scheduled for completion in the first quarter of 2006.

     The Council Bluffs market is currently insulated from other casino gaming markets, with the nearest competing gaming jurisdiction located approximately 90 miles away. In 2004, the electorate of the State of Nebraska considered various proposals to legalize casino gaming. None of the referenda were approved, which approvals could have had a material impact on the Council Bluffs casino gaming market. In the future, the State of Nebraska may again consider legalization of casino gaming which, if passed, would likely result in increased competition for Ameristar Council Bluffs. See “Risk Factors” for further discussion of these matters.

     Vicksburg

     Ameristar Vicksburg competes with three other gaming operations located in Vicksburg. In October 2003, a change of ownership occurred at one of Ameristar Vicksburg’s competitors. We believe that the change in ownership has benefited Ameristar Vicksburg through an increase in market share. One competitor completed a $1 million renovation of its hotel rooms and public areas in the fourth quarter of 2004 and has undertaken a $5 million project to construct a new 330-seat buffet. The buffet is expected to be completed in mid-2005. There were no major capital improvements or expansions by the remaining two Vicksburg market competitors in 2004. The Vicksburg market also faces regional competition from two casinos owned by a

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Native American tribe in Philadelphia, Mississippi, located about 70 miles east of Jackson and 115 miles east of Vicksburg. Vicksburg is also subject to competition from four casinos and one slots-only racetrack in Shreveport and Bossier City, Louisiana, located approximately 175 miles from Vicksburg.

     Several potential gaming sites still exist in or near Vicksburg and from time to time potential competitors have proposed the development of additional casinos. In February 2005, the Mississippi Gaming Commission granted preliminary approval for a fifth casino license in the Vicksburg market. The developer has proposed building a casino facility which includes a 250-room hotel, parking garage and other non-gaming amenities. If other required approvals are obtained, this project could open in early 2007. In addition, proposals have been made from time to time to develop additional Native American casinos in Louisiana and Mississippi, some of which could be competitive with the Vicksburg market if completed.

     Black Hawk

     Mountain High Casino competes with approximately 25 other gaming operations located in the Black Hawk and Central City gaming market in Colorado. Of the competing casinos, only five are considered “large” competitors, with over 20,000 square feet of gaming space. Mountain High Casino has one of the largest gaming floors of any casino in the Black Hawk market. Mountain High Casino’s primary competitor is the Isle of Capri, which is one of the first major casinos one encounters when entering Black Hawk from Denver via Route 119. Isle of Capri is in the process of completing a $94 million expansion of its property and the adjacent Colorado Central Station property which it purchased in 2003. The expansion of the combined properties will increase the number of hotel rooms and parking capacity and connect the two properties via an enclosed skywalk. A partial expansion of the parking complex and gaming area was completed in the fourth quarter of 2004. The remainder of the parking and hotel complex is scheduled for completion in early 2006.

     The Black Hawk-Central City gaming market is currently insulated from other casino gaming markets, with no competing markets within 50 miles. However, there have been several proposals for the development of a Native American casino located in the Denver metropolitan area. Should a casino development in the Denver area occur, the Black Hawk-Central City market would face increased competition. See “Risk Factors” for more information.

     Jackpot

     The Jackpot properties compete with four other hotels and motels (three of which also have casinos) in Jackpot. There were no major capital improvements or expansions in the Jackpot market in 2004. We are not aware of any other expansion plans by existing or potential competitors in Jackpot in the near future; however, casinos with video lottery terminals (“VLT”) similar to slot machines are operated on Native American land in Idaho, including one near Pocatello with approximately 900 VLT machines that is operated by the Shoshone-Bannock Tribes.

     In November 2002, the Idaho electorate passed Proposition 1, which legalized specific ticket-pay gaming machines on Native American reservations in the state, along with a limited growth plan allowing an increase of 5% in machine count per year, not to exceed 25% over the next 10 years, with a subsequent renegotiation of compacts thereafter. A legal challenge to Proposition 1

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has been filed and is currently pending. Litigation is also pending concerning the scope of gaming permitted under the compact between the State of Idaho and the Shoshone-Bannock Tribes.

     In addition, casino gaming on Native American lands in both western Washington and northeastern Oregon has been in operation for several years and casinos also operate in Alberta, Canada.

Employees and Labor Relations

     As of March 1, 2005, we employed approximately 7,480 full- and part-time employees. None of our employees is employed pursuant to collective bargaining or other union arrangements, although a Teamsters Union local recently unsuccessfully attempted to organize a group of beverage employees at Ameristar Kansas City. We believe our employee relations are good.

Incorporation

     Ameristar was incorporated in Nevada in 1993.

Risk Factors

The gaming industry is very competitive and increased competition could have a material adverse effect on our future operations.

     The gaming industry is very competitive and we face dynamic competitive pressures in each of our markets. Several of our competitors are larger and have greater financial and other resources. We may choose or be required to take actions in response to competitors that may increase our marketing costs and other operating expenses.

     Our operating properties are located in jurisdictions that restrict gaming to certain areas or are adjacent to states that prohibit or restrict gaming operations. These restrictions and prohibitions provide substantial benefits to our business and our ability to attract and retain customers. The legalization or expanded legalization or authorization of gaming within or near a market area of one of our properties could result in a significant increase in competition and have a material adverse effect on our business, financial condition and results of operations. Economic difficulties faced by state governments, as well as the increased acceptance of gaming as a leisure activity, could lead to intensified political pressure for the expansion of legalized gaming.

     From time to time, legislation and ballot measures have been unsuccessfully proposed in Kansas, Nebraska and Colorado for the legalization or expansion of gaming. In Nebraska, several referenda on the statewide ballot that would have legalized two alternative forms of casino gaming were defeated in November 2004. In both Nebraska and Kansas, bills have been introduced from time to time in the legislature for the legalization of casino gaming, several of which are currently pending in Kansas. These proposals would authorize gaming in or near, among other places, Omaha, Nebraska and Kansas City, Kansas, in close proximity to our existing facilities in Council Bluffs, Iowa and Kansas City, Missouri, respectively. The legalization of gaming in these locations and the additional competition resulting from the subsequent development of competing gaming properties could have a material adverse effect on us.

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     The Missouri Gaming Commission has prioritized for investigation gaming license applications for new casino facilities in downtown St. Louis and southeastern St. Louis County, approximately 15 miles and 20 miles, respectively, from Ameristar St. Charles. St. Louis city officials and members of the Missouri Gaming Commission have also stated that they would like to see a currently operating casino in downtown St. Louis improved or replaced. If any of these developments is successfully completed, we will face additional or enhanced competition.

     Our competitor that operates the pari-mutuel racetrack casino in Council Bluffs recently announced plans to rebrand the property as part of a major expansion and renovation. Upon completion, which is expected to occur in the first quarter of 2006, the property will include 69% more gaming space, 1,900 slot machines, 36 table games, a poker room and additional non-gaming amenities. Prior to a change in Iowa law in 2004, racetrack casinos were not permitted to offer table games or video poker machines. The future operating results of Ameristar Council Bluffs may be adversely affected by the additional competition.

     Our principal competitors in the St. Louis and Black Hawk markets have also recently completed, or will soon complete, significant expansions of their facilities. In Vicksburg, several potential gaming sites still exist, and one company has recently received preliminary Mississippi Gaming Commission approval for the development of a new casino.

     Native American gaming facilities in some instances operate under regulatory and financial requirements that are less stringent than those imposed on state-licensed casinos, which could provide them with a competitive advantage and lead to increased competition in our markets. We believe that recent operating results at our Jackpot properties have been adversely affected by intensified competition from an Idaho Native American facility that is closer to a portion of our market area. The legislatures in Kansas and Nebraska are considering pending legislation that would allow various forms of Native American gaming in close proximity to our properties in Kansas City and Council Bluffs. Additionally, two federally recognized tribes have asserted land claims in Colorado and are attempting to have land in metropolitan Denver placed in trust by the federal government to be used for casino gaming.

     The entry into our current markets of additional competitors could have a material adverse effect on our business, financial condition and results of operations, particularly if a competitor were to obtain a license to operate a gaming facility in a superior location. Furthermore, increases in the popularity of, and competition from, Internet and other account wagering and gaming services, which allow customers to wager on a wide variety of sporting events and play Las Vegas-style casino games from home, could have a material adverse effect on our business, financial condition, operating results and prospects.

If the jurisdictions in which we operate increase gaming taxes and fees, our results could be adversely affected.

     State and local authorities raise a significant amount of revenue through taxes and fees on gaming activities. From time to time, legislators and government officials have proposed changes in tax laws, or in the administration of such laws, affecting the gaming industry. Periods of economic downturn and budget deficits such as currently exist in many states may intensify the efforts of state and local governments to raise revenues through increases in gaming taxes. In 2002, large gaming tax increases were enacted in Illinois and Indiana. In 2003, Illinois enacted an additional large gaming tax increase, the State of New Jersey increased various taxes on casinos

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and casino patrons and the State of Nevada increased its tax on gross gaming revenues from 6.25% to 6.75%.

     In 2004, in response to an Iowa Supreme Court ruling that decreased the gaming taxes payable by casinos at pari-mutuel racetracks, the Iowa legislature approved an increase in the maximum tax rate on gaming revenues of riverboat casinos from 20% to 22%, effective July 1, 2004. We will also be required to pay a special additional assessment of approximately $3.6 million in each of 2005 and 2006, which is recoverable as a credit against future gaming taxes beginning in 2010. This tax increase has negatively impacted operating income at Ameristar Council Bluffs and will continue to do so.

     Several bills have been introduced in the Missouri legislature in recent years that would increase the gaming tax rate, and similar legislation has been introduced in the current session.

     In Colorado, the Colorado Limited Gaming Control Commission has the authority to establish the gaming tax rate on an annual basis, up to a maximum rate of 40% of gross receipts, without further legislative action. The current rate of 20% on gross receipts over $15.0 million has been in effect since 1996.

     If the jurisdictions in which we operate were to further increase gaming taxes or fees, depending on the magnitude of the increase and any offsetting factors (such as the elimination of the buy-in limit in Missouri), our financial condition and results of operations could be materially adversely affected.

Our business is subject to restrictions and limitations imposed by gaming regulatory authorities that could adversely affect us.

     The ownership and operation of casino gaming facilities are subject to extensive state and local regulation. The States of Missouri, Iowa, Mississippi, Colorado and Nevada and the applicable local authorities require various licenses, findings of suitability, registrations, permits and approvals to be held by us and our subsidiaries. The Missouri Gaming Commission, the Iowa Racing and Gaming Commission, the Mississippi Gaming Commission, the Colorado Limited Gaming Control Commission and the Nevada Gaming Commission may, among other things, limit, condition, suspend, revoke or not renew a license or approval to own the stock of any of our Missouri, Iowa, Mississippi, Colorado or Nevada subsidiaries, respectively, for any cause deemed reasonable by such licensing authority. Our licenses in Missouri need to be renewed every two years, our gaming licenses in Iowa and Colorado must be renewed or continued every year, and our gaming license in Mississippi must be renewed every three years. If we violate gaming laws or regulations, substantial fines could be levied against us, our subsidiaries and the persons involved, and we could be forced to forfeit portions of our assets. The suspension, revocation or non-renewal of any of our licenses or the levy on us of substantial fines or forfeiture of assets could have a material adverse effect on our business, financial condition and results of operations.

     To date, we have obtained all governmental licenses, findings of suitability, registrations, permits and approvals necessary for the operation of our currently operating gaming activities. However, gaming licenses and related approvals are deemed to be privileges under the laws of all the jurisdictions in which we operate. We cannot assure you that our existing licenses, permits

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and approvals will be maintained or extended. We also cannot assure you that any new licenses, permits and approvals that may be required in the future will be granted to us.

     Financial leverage may impair our financial condition and restrict our operations.

     Our leverage ratio (as defined in our senior credit facilities) has improved from 3.49:1 as of December 31, 2003 to 3.29:1 as of December 31, 2004, while our total indebtedness has increased from $716.9 million as of December 31, 2003 to $766.3 million as of December 31, 2004 due to increased borrowing to fund our acquisition of Mountain High Casino. The degree to which we are leveraged could have important adverse consequences to our business, including:

     The terms of our senior credit facilities and the indenture governing our senior subordinated notes contain covenants that may restrict our ability to, among other things, borrow money, pay dividends, make capital expenditures and effect a consolidation, merger or disposal of substantially all of our assets. Although the covenants in our senior credit facilities and the indenture are subject to various exceptions that are intended to allow us to operate without undue restraint in certain anticipated circumstances, we cannot assure you that these covenants will not adversely affect our ability to finance future operations or capital needs or to engage in other activities that may be in our best interest. In addition, our long-term debt requires us to maintain specified financial ratios and satisfy certain financial condition tests, which may require that we take action to reduce our debt or to act in a manner contrary to our business objectives. A breach of any of these covenants would result in a default under our senior credit facilities and the indenture. If an event of default under our senior credit facilities occurs, the lenders could elect to declare all amounts outstanding thereunder, together with accrued interest, to be immediately due and payable. In addition, our senior credit facilities are secured by first priority security interests on substantially all of our real and personal property, including the capital stock of our subsidiaries. If we are unable to pay all amounts declared due and payable in the event of a default, the lenders could foreclose on these assets.

     We will soon need to obtain replacement financing.

     Our revolving credit facility and our term loan facility mature in December 2005 and December 2006, respectively. Additionally, without any change to the existing terms of our senior credit facilities, it is likely that we would violate covenants relating to permitted dividend payments, the maximum senior debt ratio and permitted capital expenditures during the second

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half of 2005. Accordingly, we will be required to refinance our senior debt in the near future. We can offer no assurance as to the terms of any such refinancing that may be available.

     We are subject to the risk of rising interest rates.

     All of our borrowings under our senior credit facilities bear interest at variable rates. As of December 31, 2004, we had $381.0 outstanding under our senior credit facilities and $1.0 million in other long-term debt that bears interest at variable rates. If short-term interest rates continue to rise, our interest cost will increase, which will adversely affect our net income and available cash.

     Worsening economic conditions or geopolitical circumstances may adversely affect our business.

     Our business may be adversely affected by economic downturns and instability, as we are dependent on discretionary spending by our customers. Any worsening of current economic conditions could cause fewer people to spend money at our properties and could adversely affect our revenues. Other geopolitical events, such as terrorism or the threat of terrorism, may deter customers from visiting our properties.

     We have limited opportunities to grow our business.

     The casino gaming industry has limited growth opportunities. Most jurisdictions in which casino gaming is currently permitted place numerical and/or geographical limitations on the issuance of new gaming licenses. Although a number of jurisdictions in the United States and foreign countries are considering legalizing or expanding casino gaming, in some cases new gaming operations may be restricted to specific locations, such as pari-mutuel racetracks. Moreover, it is not clear whether the tax, land use planning and regulatory structures that may be applicable to any new gaming opportunity would make the development and operation of a casino financially acceptable. We expect that there will be intense competition for any attractive new opportunities that do arise, and many of the companies competing for such opportunities will have greater resources than we do. Therefore, we cannot assure you that we will be able to successfully expand our business.

     Craig H. Neilsen owns a majority of our common stock and controls our affairs.

     Mr. Neilsen is our Chairman of the Board, President and Chief Executive Officer, and he owns approximately 56% of our outstanding Common Stock. Accordingly, Mr. Neilsen has the ability to control our operations and affairs, including the election of the entire Board of Directors and, except as otherwise provided by law, other matters submitted to a vote of the stockholders, including a merger, consolidation or sale of assets. As a result, actions which may be supported by a majority of the other stockholders could be blocked by Mr. Neilsen. In addition, Mr. Neilsen’s substantial ownership affects the liquidity in the market for our Common Stock.

     A change in control could result in the acceleration of our debt obligations.

     Certain changes in control could result in the acceleration of our senior credit facilities and our senior subordinated notes. This acceleration could be triggered in the event Mr. Neilsen sells a significant portion of his stock or upon his death if his estate, private foundation, heirs or

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devisees sell a substantial number of shares of our Common Stock, which they might have to do in order to pay estate tax liabilities or satisfy legal requirements applicable to shareholdings by private foundations. We cannot assure you that we would be able to repay any indebtedness that is accelerated as a result of a change in control, and this would likely materially adversely affect our financial condition.

Our business may be materially impacted by an act of terrorism or by additional security requirements that may be imposed on us.

     The U.S. Department of Homeland Security has stated that places where large numbers of people congregate, including hotels, are subject to a heightened risk of terrorism. An act of terrorism affecting one of our properties, whether or not covered by insurance, or otherwise affecting the travel and tourism industry in the United States, may have a material adverse effect on our business. Additionally, our business may become subject to increased security measures designed to prevent terrorist acts.

Many factors, some of which are beyond our control, could adversely affect our ability to successfully complete our construction and development projects as planned.

     General Construction Risks — Delays and Cost Overruns. Construction and expansion projects for our properties entail significant risks. These risks include: (1) shortages of materials (including slot machines or other gaming equipment); (2) shortages of skilled labor or work stoppages; (3) unforeseen construction scheduling, engineering, environmental or geological problems; (4) weather interference, floods, fires or other casualty losses; (5) unanticipated cost increases; and (6) construction period disruption to existing operations.

     Our anticipated costs and construction periods for construction projects are based upon budgets, conceptual design documents and construction schedule estimates prepared by us in consultation with our architects, consultants and contractors. The cost of any construction project undertaken by us may vary significantly from initial expectations, and we may have a limited amount of capital resources to fund cost overruns on any project. If we cannot finance cost overruns on a timely basis, the completion of one or more projects may be delayed until adequate cash flows from operations or other financing is available. The completion date of any of our construction projects could also differ significantly from initial expectations for construction-related or other reasons. We cannot assure you that any project will be completed on time, if at all, or within established budgets. Significant delays or cost overruns on our construction projects could have a material adverse effect on our business, financial condition and results of operations.

     We employ “fast-track” design and construction methods in some of our construction and development projects. This involves the design of future stages of construction while earlier stages of construction are underway. Although we believe that the use of fast-track design and construction methods can reduce the overall construction time, these methods may not always result in such reductions, often involve additional construction costs than otherwise would be incurred and may increase the risk of disputes with contractors, all of which could have a material adverse effect on our business, financial condition and results of operations.

     Construction Dependent upon Available Financing and Cash Flows from Operations. The availability of funds under our senior credit facilities at any time will be dependent upon, among

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other factors, the amount of our consolidated earnings before interest, taxes, depreciation and amortization expense (“EBITDA”) during the preceding four full fiscal quarters. Our future operating performance will be subject to financial, economic, business, competitive, regulatory and other factors, many of which are beyond our control. Accordingly, we cannot assure you that our future consolidated EBITDA and the resulting availability of operating cash flows or borrowing capacity will be sufficient to allow us to undertake or complete current or future construction projects.

     As a result of operating risks, including those described in this section, and other risks associated with a new venture, we cannot assure you that, once completed, any development project will increase our operating profits or operating cash flows.

If any of our key personnel leaves us, our business may be significantly affected.

     We depend on the continued performance of Craig H. Neilsen, our Chairman, President and Chief Executive Officer, and the rest of our management team. If we lose the services of Mr. Neilsen, any of our other key executives or our senior property management personnel and cannot replace such persons in a timely manner, it could have a material adverse effect on our business.

The market for qualified property and corporate management personnel is subject to intense competition.

     We have experienced and expect to continue to experience strong competition in hiring and retaining qualified property and corporate management personnel, including competition from numerous Native American gaming facilities that are not subject to the same taxation regimes as we are and therefore may be willing and able to pay higher rates of compensation. Recruiting and retaining qualified management personnel is particularly difficult at Ameristar Vicksburg, Mountain High Casino and the Jackpot properties due to local market conditions. If we are unable to successfully recruit and retain qualified management personnel at our properties or at our corporate level, our results of operations could be materially adversely affected.

Adverse weather conditions in the areas in which we operate could have an adverse effect on our results of operations and financial condition.

     Adverse weather conditions, particularly flooding, heavy snowfall and other extreme conditions, can deter our customers from traveling or make it difficult for them to visit our properties. If any of our properties were to experience prolonged adverse weather conditions, or if our Midwestern and Colorado properties were to simultaneously experience adverse weather conditions, our results of operations and financial condition would be adversely affected.

Any loss from service of our riverboat and barge facilities for any reason could materially adversely affect us.

     Our riverboat and barge facilities could be lost from service due to casualty, mechanical failure, extended or extraordinary maintenance, floods or other severe weather conditions. In addition, U.S. Coast Guard regulations set limits on the operation of vessels and require that vessels be operated by a minimum complement of licensed personnel.

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     The U.S. Coast Guard also requires all United States flagged-passenger vessels operating exclusively in fresh water to conduct a thorough dry-dock inspection of underwater machinery, valves and hull every five years. Less stringent inspection requirements apply to permanently moored barges like those at Ameristar Kansas City, Ameristar St. Charles and Ameristar Vicksburg. The Ameristar Council Bluffs riverboat was scheduled for its dry-dock inspection in October 2005, but we have been accepted into a U.S. Coast Guard program that has extended the dry-dock requirement until April 2008 by agreeing to undergo a thorough underwater inspection in October 2005. A dry-dock inspection would take the Council Bluffs casino out of service for a substantial period of time, which could have a material adverse effect on Ameristar Council Bluffs.

     The Ameristar Vicksburg site has experienced some ongoing geologic instability that requires periodic maintenance and improvements. Although we have reinforced the cofferdam basin in which the vessel floats, further reinforcements may be necessary. We are also monitoring the site to evaluate what further steps, if any, may be necessary to stabilize the site to permit operations to continue. A site failure would require Ameristar Vicksburg to limit or cease operations.

     The loss of a riverboat or barge facility from service for any period of time likely would adversely affect our operating results and borrowing capacity under our long-term debt facilities in an amount that we are unable to reasonably estimate. It could also result in the occurrence of an event of a default under our credit agreement.

We could face severe penalties and material remediation costs if we fail to comply with applicable environmental regulations.

     As is the case with any owner or operator of real property, we are subject to a variety of federal, state and local governmental regulations relating to the use, storage, discharge, emission and disposal of hazardous materials. Failure to comply with environmental laws could result in the imposition of severe penalties or restrictions on operations by government agencies or courts, which could adversely affect our operations. We do not have environmental liability insurance to cover most such events, and the environmental liability insurance coverage we maintain to cover certain events includes significant limitations and exclusions. In addition, if we discover any significant environmental contamination affecting any of our properties, we could face material remediation costs or additional development costs for future expansion activities.

Government Regulation

     The ownership and operation of casino gaming facilities are subject to extensive state and local regulation. We are required to obtain and maintain gaming licenses in each of the jurisdictions in which we conduct gaming. The limitation, conditioning or suspension of gaming licenses could (and the revocation or non-renewal of gaming licenses, or the failure to reauthorize gaming in certain jurisdictions, would) materially adversely affect our operations in that jurisdiction. In addition, changes in law that restrict or prohibit our gaming operations in any jurisdiction could have a material adverse effect on us.

     Missouri

     The ownership and operation of riverboat and dockside gaming facilities in Missouri are subject to extensive state and local regulation, but primarily the licensing and regulatory control

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of the Missouri Gaming Commission. The Missouri Riverboat Gaming Act (the “Missouri Act”) provides for the licensing and regulation of riverboat and dockside gaming operations on the Mississippi and Missouri Rivers in the State of Missouri and the licensing and regulation of persons who distribute gaming equipment and supplies to gaming licensees.

     The Missouri Gaming Commission has discretion to approve gaming license applications for permanently moored (“dockside”) casinos, powered (“excursion”) riverboat casinos and barges and to determine the number, location and type of excursion gambling boats allowed each licensee. Due to safety concerns, all gaming vessels on the Missouri River are permitted to be moored in moats within 1,000 feet of the river. Gaming licenses are initially issued for two one-year periods and must be renewed every two years thereafter. The gaming licenses at Ameristar Kansas City and Ameristar St. Charles are next subject to renewal in September 2006. No gaming licensee may pledge or transfer in any way any license, or any interest in a license, issued by the Missouri Gaming Commission. As a result, the gaming licenses of our wholly owned Missouri subsidiaries were not pledged to secure our senior credit facilities.

     The issuance, transfer and pledge of ownership interests in a gaming licensee are also subject to strict notice and approval requirements. Missouri Gaming Commission regulations prohibit a licensee from doing any of the following without at least 60 days’ prior notice to the Missouri Gaming Commission, and during such period, the Missouri Gaming Commission may disapprove the transaction or require the transaction be delayed pending further investigation:

provided that no ownership interest may be transferred in any way pursuant to any pledge or security interest without separate notice to the Missouri Gaming Commission at least 30 days prior to such transfer, which restriction must be specifically included in the grant of a security interest.

     Under the Missouri Act, all members of our Board of Directors, certain members of our management and certain of our employees associated with our gaming business are required to obtain and maintain occupational licenses. Currently, all such persons required to obtain occupational licenses have obtained them. The Missouri Gaming Commission may deny an application for a license for any cause that it deems reasonable.

     Substantially all loans, leases, sales of securities and similar financing transactions by a gaming licensee must be reported to and approved by the Missouri Gaming Commission. Missouri Gaming Commission regulations require a licensee to notify the Missouri Gaming Commission of its intention to consummate any of the following transactions at least 15 days prior to such consummation, and the Missouri Gaming Commission may reopen the licensing hearing prior to or following the consummation date to consider the effect of the transaction on the licensee’s suitability:

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The Missouri Gaming Commission may waive or reduce the 15-day notice requirement.

     The Missouri Act imposes operational requirements on riverboat operators, including a charge of $2 per gaming customer per two-hour “cruise” that licensees must pay to the Missouri Gaming Commission, certain minimum payout requirements, a 20% tax on adjusted gross receipts, prohibitions against providing credit to gaming customers (except for the use of credit cards and cashing checks) and a requirement that each licensee reimburse the Missouri Gaming Commission for all costs of any Missouri Gaming Commission staff necessary to protect the public on the licensee’s riverboat. Licensees must also submit audited quarterly financial reports to the Missouri Gaming Commission and pay the associated auditing fees. Other areas of operation which are subject to regulation under Missouri rules are the size, denomination and handling of chips and tokens, the surveillance methods and computer monitoring of electronic games, accounting and audit methods and procedures, and approval of an extensive internal control system. The Missouri rules also require that all of an operator’s chips, tokens, dice, playing cards and electronic gaming devices must be acquired from suppliers licensed by the Missouri Gaming Commission, or another person or entity approved by the Missouri Gaming Commission.

     The Missouri Act provides for a buy-in limit of $500 per person per two-hour “cruise.” Although the Missouri Act provides no limit on the amount of riverboat space that may be used for gaming, the Missouri Gaming Commission can impose space limitations through the adoption of rules and regulations. Additionally, United States Coast Guard safety regulations could affect the amount of riverboat space that may be devoted to gaming. The Missouri Act also includes requirements as to the form of riverboats, which must resemble Missouri’s riverboat history to the extent practicable and include certain non-gaming amenities. All licensees currently operating riverboat gaming operations in Missouri are authorized to conduct all or a portion of their operations on a dockside basis, and open and continuous boarding is permitted.

     The Missouri Act requires each licensee to post a bond or other security to guarantee that the licensee complies with its statutory obligations. The Missouri Act also gives the Missouri Gaming Commission the authority to require gaming licensees to post a bond or other form of security to the State of Missouri to, among other things, guarantee the completion of an expansion of a gaming facility within a time period determined by the Missouri Gaming Commission.

     To promote safety, the Missouri Gaming Commission has required that gaming entertainment barges obtain annual certification from the American Bureau of Shipping.

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     If the Missouri Gaming Commission decides that a gaming subsidiary violated a gaming law or regulation, the Missouri Gaming Commission could limit, condition, suspend or revoke the license of the gaming subsidiary. In addition, a gaming subsidiary, its parent company and the persons involved could be subject to substantial fines for each separate violation. Limitation, conditioning or suspension of any gaming license could (and revocation of any gaming license would) materially adversely affect Ameristar and our gaming subsidiaries’ gaming operations.

     The Missouri Gaming Commission regulates the issuance of excursion liquor licenses, which authorize the licensee to serve, offer for sale, or sell intoxicating liquor aboard any excursion gambling boat, or facility immediately adjacent to and contiguous with the excursion gambling boat, which is owned and operated by the licensee. An excursion liquor license is granted for a one-year term by the Missouri Gaming Commission and is renewable annually. The Commission can discipline an excursion liquor licensee for any violation of Missouri law or the Missouri Gaming Commission’s rules. Licensees are responsible for the conduct of their business and for any act or conduct of any employee on the premises that is in violation of the Missouri Act or the rules of the Missouri Gaming Commission. Missouri Gaming Commission liquor control regulations also include prohibitions on certain intoxicating liquor promotions and a ban on fees accepted for advertising products. Only Class A licensees can obtain a liquor license from the Missouri Gaming Commission. Class A licenses are licenses granted by the Commission to allow the holder to conduct gambling games on an excursion gambling boat and to operate an excursion gambling boat. The sale of alcoholic beverages at Ameristar Kansas City is also subject to licensing, control and regulation by Clay County.

     Iowa

     Ameristar’s Council Bluffs operations are conducted by our wholly owned subsidiary, Ameristar Casino Council Bluffs, Inc. (“ACCBI”), and are subject to Chapter 99F of the Iowa Code and the regulations promulgated thereunder. ACCBI’s gaming operations are subject to the licensing and regulatory control of the Iowa Racing and Gaming Commission (the “Iowa Gaming Commission”).

     Under Iowa law, wagering on a “gambling game” is legal when conducted by a licensee on an “excursion gambling boat.” An “excursion gambling boat” is an excursion boat or moored barge. “Gambling game” means any game of chance authorized by the Iowa Gaming Commission. In 2004, the Iowa legislature eliminated the mandatory cruising requirement for an “excursion gambling boat” and ACCBI’s riverboat is no longer cruising.

     The legislation permitting riverboat gaming in Iowa authorizes the granting of licenses to “qualified sponsoring organizations.” A “qualified sponsoring organization” is defined as a person or association that can show to the satisfaction of the Iowa Gaming Commission that the person or association is eligible for exemption from federal income taxation under Section 501(c)(3), (4), (5), (6), (7), (8), (10) or (19) of the Internal Revenue Code (hereinafter “not-for-profit corporation”). The not-for-profit corporation is permitted to enter into operating agreements with persons qualified to conduct riverboat gaming operations. Such operators must be approved and licensed by the Iowa Gaming Commission. On January 27, 1995, the Iowa Gaming Commission authorized the issuance of a license to conduct gambling games on an excursion gambling boat to Iowa West Racing Association, a not-for-profit corporation organized for the purpose of facilitating riverboat gaming in Council Bluffs (the “Association”). The Association has entered into a sponsorship agreement with ACCBI authorizing ACCBI to

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operate riverboat gaming operations in Council Bluffs under the Association’s gaming license (the “Operator’s Contract”), and the Iowa Gaming Commission has approved this contract. The term of the Operator’s Contract runs until March 31, 2010.

     Under Iowa law, a license to conduct gambling games may be issued in a county only if the county electorate has approved such gambling games. Although the electorate of Pottawattamie County, which includes the City of Council Bluffs, most recently reauthorized by referendum in 2002 the gambling games conducted by ACCBI, a reauthorization referendum must be submitted to the electorate in the general election to be held in 2010 and each eight years thereafter. Each such referendum requires the affirmative vote of a majority of the persons voting thereon. In the event a reauthorization referendum is defeated in 2010 or thereafter, the licenses granted to the Association and ACCBI would not be subject to renewal and ACCBI would be required to cease conducting gambling games. After a referendum has been held which defeated a proposal to conduct gambling games on excursion gambling boats, another referendum on a proposal to conduct gambling games on excursion gambling boats may not be held for at least eight years.

     Substantially all of ACCBI’s material transactions are subject to review and approval by the Iowa Gaming Commission. Written and oral contracts and business arrangements involving a related party or in which the term exceeds three years or the total value exceeds $100,000 are agreements that qualify for submission to and approval by the Iowa Gaming Commission (“Qualifying Agreements”). Qualifying Agreements are limited to: (1) obligations that expense, encumber or lend ACCBI assets to anyone other than a not-for-profit entity or a unit of government for the payment of taxes and utilities; (2) any disposal of ACCBI assets or the provision of goods and services at less than market value to anyone other than a not-for-profit entity or a unit of government; (3) a previously approved Qualifying Agreement, if consideration exceeds the approved amount by the greater of $100,000 or 25%; and (4) any type of contract, regardless of value or term, where a third party provides electronic access to cash or credit for a patron of the facility. Each Qualifying Agreement must be submitted to the Iowa Gaming Commission within 30 days of execution. Iowa Gaming Commission approval must be obtained prior to implementation, unless the Qualifying Agreement contains a written clause stating that the agreement is subject to Iowa Gaming Commission approval. Qualifying Agreements that are ongoing or open-ended need only be submitted on initiation, unless there is a material change in terms or noncompliance with the requirement that consideration be given to the use of Iowa resources, goods and services. Additionally, contracts negotiated between ACCBI and a related party must be accompanied by economic and qualitative justification.

     ACCBI is required to notify the Iowa Gaming Commission of the identity of each director, corporate officer and owner, partner, joint venturer, trustee or any other person who has a beneficial interest of 5% or more, direct or indirect, in ACCBI. The Iowa Gaming Commission may require ACCBI to submit background information on such persons. The Iowa Gaming Commission may require ACCBI to provide a list of persons holding beneficial ownership interests in ACCBI of less than 5%. For purposes of these rules, “beneficial interest” includes all direct and indirect forms of ownership or control, voting power or investment power held through any contract, lien, lease, partnership, stockholding, syndication, joint venture, understanding, relationship, present or reversionary right, title or interest or otherwise. The Iowa Gaming Commission may suspend or revoke the license of a licensee in which a director, corporate officer or holder of a beneficial interest includes or involves any person or entity which is found to be ineligible as a result of want of character, moral fitness, financial responsibility,

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professional responsibility or due to failure to meet other criteria employed by the Iowa Gaming Commission.

     ACCBI must submit detailed financial, operating and other reports to the Iowa Gaming Commission. ACCBI must file weekly and monthly gaming reports indicating adjusted gross receipts received from gambling games and the total number and amount of money received from admissions. Additionally, ACCBI must file annual financial statements covering all financial activities related to its operations for each fiscal year. ACCBI must also keep detailed records regarding its equity structure and owners.

     Iowa has a graduated wagering tax equal to 5% of the first $1.0 million of annual adjusted gross receipts, 10% of the next $2.0 million of annual adjusted gross receipts and 22% of annual adjusted gross receipts over $3.0 million for an excursion gambling boat. In addition, the state charges other fees on a per-customer basis. Additionally, ACCBI pays to the City of Council Bluffs a fee equal to $0.50 per passenger. Under the Operator’s Contract, ACCBI also pays the Association a graduated fee equal to 5% of the first $30 million of annual adjusted gross receipts, 4% of the next $30 million of annual adjusted gross receipts, 3% of the next $30 million of annual adjusted gross receipts, 2% of the next $30 million of annual adjusted gross receipts and 0.5% of the next $30 million of annual adjusted gross receipts (up to $150,000,000 of annual adjusted gross receipts). ACCBI will also be required to pay a special additional assessment of approximately $3.6 million in each of 2005 and 2006, which is recoverable as a credit against future gaming taxes beginning in 2010.

     All persons participating in any capacity at a gaming facility, with the exception of certified law enforcement officers while they are working for the facility as uniformed officers, are required to obtain occupational licenses from the Iowa Gaming Commission. All such licenses require annual renewal. The Iowa Gaming Commission has broad discretion to deny or revoke any occupational license.

     If the Iowa Gaming Commission decides that a gaming law or regulation has been violated, the Iowa Gaming Commission has the power to assess fines, revoke or suspend licenses or to take any other action as may be reasonable or appropriate to enforce the gaming rules and regulations.

     ACCBI is subject to licensure by the Alcoholic Beverages Division (“ABD”) of the Iowa Department of Commerce, which administers and enforces the laws of the State of Iowa concerning alcoholic beverages. Additionally, ACCBI is subject to liquor ordinances adopted by local authorities. A local authority may adopt ordinances governing establishments, which are located within their jurisdiction. Local ordinances may be more restrictive than state law, but they may not conflict with state law. The ABD and the local authorities have full power to suspend or revoke any license for the serving of alcoholic beverages.

     Mississippi

     The ownership and operation of casino gaming facilities in the State of Mississippi are subject to extensive state and local regulation but primarily the licensing and regulatory control of the Mississippi Gaming Commission (the “Mississippi Commission”).

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     The Mississippi Gaming Control Act (the “Mississippi Act”) is similar to the Nevada Gaming Control Act. The Mississippi Commission has adopted regulations that are also similar in many respects to the Nevada gaming regulations.

     The laws, regulations and supervisory procedures of the Mississippi Commission are based upon declarations of public policy that are concerned with, among other things, (1) the prevention of unsavory or unsuitable persons from having direct or indirect involvement with gaming at any time or in any capacity; (2) the establishment and maintenance of responsible accounting practices and procedures; (3) the maintenance of effective controls over the financial practices of licensees, including the establishment of minimum procedures for internal fiscal affairs and the safeguarding of assets and revenues, providing for reliable record keeping and requiring the filing of periodic reports with the Mississippi Commission; (4) the prevention of cheating and fraudulent practices; (5) providing a source of state and local revenues through taxation and licensing fees; and (6) ensuring that gaming licensees, to the extent practicable, employ Mississippi residents. The regulations are subject to amendment and interpretation by the Mississippi Commission. We believe that our compliance with the licensing procedures and regulatory requirements of the Mississippi Commission will not affect the marketability of our securities. Changes in Mississippi laws or regulations may limit or otherwise materially affect the types of gaming that may be conducted and such changes, if enacted, could have an adverse effect on us and our Mississippi gaming operations.

     The Mississippi Act provides for legalized dockside gaming in each of the 14 counties that border the Gulf Coast or the Mississippi River, but only if the voters in the county have not voted to prohibit gaming in that county. In recent years, certain anti-gaming groups proposed for adoption through the initiative and referendum process certain amendments to the Mississippi Constitution, which would prohibit gaming in the state. The proposals were declared illegal by Mississippi courts on constitutional and procedural grounds. The latest ruling was appealed to the Mississippi Supreme Court, which affirmed the decision of the lower court. If another such proposal were to be made and if a sufficient number of signatures were to be gathered to place a legal initiative on the ballot, it would be possible for the voters of Mississippi to consider such a proposal in November 2006. While we are unable to predict whether such an initiative will appear on a ballot or the likelihood of such an initiative being approved by the voters, if such an initiative were approved and gaming were prohibited in Mississippi, it would have a significant adverse effect on us and our operations.

     Currently, dockside gaming is permissible in nine of the 14 eligible counties in the state and gaming operations have commenced in seven counties. Under Mississippi law, gaming vessels must be located on the Mississippi River or on navigable waters in eligible counties along the Mississippi River or in the waters lying south of the counties along the Mississippi Gulf Coast. The Mississippi Act permits unlimited stakes gaming on permanently moored vessels on a 24-hour basis and does not restrict the percentage of space which may be utilized for gaming. The Mississippi Act permits substantially all traditional casino games and gaming devices.

     We and any subsidiary of ours that operates a casino in Mississippi (a “Mississippi Gaming Subsidiary”) are subject to the licensing and regulatory control of the Mississippi Commission. As the sole stockholder of Ameristar Casino Vicksburg, Inc. (“ACVI”), we are registered under the Mississippi Act as a publicly traded corporation (a “Registered Corporation”). As a Registered Corporation, we are required periodically to submit detailed financial and operating

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reports to the Mississippi Commission and furnish any other information which the Mississippi Commission may require. If we are unable to continue to satisfy the registration requirements of the Mississippi Act, we and any Mississippi Gaming Subsidiary cannot own or operate gaming facilities in Mississippi. No person may become a stockholder of or receive any percentage of profits from a Mississippi Gaming Subsidiary without first obtaining licenses and approvals from the Mississippi Commission. We have obtained such approvals in connection with our ownership of ACVI.

     A Mississippi Gaming Subsidiary must maintain a gaming license from the Mississippi Commission to operate a casino in Mississippi. Such licenses are issued by the Mississippi Commission subject to certain conditions, including continued compliance with all applicable state laws and regulations. There are no limitations on the number of gaming licenses that may be issued in Mississippi. Gaming licenses require the payment of periodic fees and taxes, are not transferable, are issued for a three-year period (and may be continued for two additional three-year periods) and must be renewed periodically thereafter. ACVI most recently was granted a renewal of its gaming license by the Mississippi Commission on December 18, 2002. This license expires on January 23, 2006.

     Certain of our officers and employees and the officers, directors and certain key employees of our Mississippi Gaming Subsidiary must be found suitable or approved by the Mississippi Commission. We believe that we have obtained, applied for or are in the process of applying for all necessary findings of suitability with respect to such persons affiliated with Ameristar or ACVI, although the Mississippi Commission, in its discretion, may require additional persons to file applications for findings of suitability. In addition, any person having a material relationship or involvement with Ameristar or ACVI may be required to be found suitable, in which case those persons must pay the costs and fees associated with such investigation. The Mississippi Commission may deny an application for a finding of suitability for any cause that it deems reasonable. Moreover, changes in certain licensed positions, including changes in any person’s corporate position or title, must be reported to the Mississippi Commission, and the Mississippi Commission has jurisdiction to disapprove such changes. The Mississippi Commission has the power to require us and any Mississippi Gaming Subsidiary to suspend or dismiss officers, directors and other key employees or sever relationships with other persons who refuse to file appropriate applications or whom the authorities find unsuitable to act in such capacities. Determinations of suitability or questions pertaining to licensing are not subject to judicial review in Mississippi.

     At any time, the Mississippi Commission has the power to investigate and require the finding of suitability of any record or beneficial stockholder of Ameristar. The Mississippi Act requires any person who acquires more than 5% of any class of voting securities of a Registered Corporation, as reported to the Securities and Exchange Commission, to report the acquisition to the Mississippi Commission, and such person may be required to be found suitable. Also, any person who becomes a beneficial owner of more than 10% of any class of voting securities of a Registered Corporation, as reported to the Securities and Exchange Commission, must apply for a finding of suitability by the Mississippi Commission and must pay the costs and fees that the Mississippi Commission incurs in conducting the investigation. If a stockholder who must be found suitable is a corporation, partnership or trust, it must submit detailed business and financial information, including a list of beneficial owners.

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     The Mississippi Commission generally has exercised its discretion to require a finding of suitability of any beneficial owner of more than 5% of any class of voting securities of a Registered Corporation. However, under certain circumstances, an “institutional investor,” as defined in the Mississippi Commission’s regulations, which acquires more than 10% but not more than 15% of the voting securities of a Registered Corporation may apply to the Mississippi Commission for a waiver of such finding of suitability if such institutional investor holds the voting securities for investment purposes only. An institutional investor shall not be deemed to hold voting securities for investment purposes unless the voting securities were acquired and are held in the ordinary course of business as an institutional investor and not for the purpose of causing, directly or indirectly, the election of a majority of the members of the board of directors of the Registered Corporation, any change in the corporate charter, bylaws, management, policies or operations of the Registered Corporation or any of its gaming affiliates, or any other action which the Mississippi Commission finds to be inconsistent with holding the voting securities for investment purposes only. Activities that are not deemed to be inconsistent with holding voting securities for investment purposes include (1) voting on all matters voted on by stockholders; (2) making financial and other inquiries of management of the type normally made by securities analysts for informational purposes and not to cause a change in the Registered Corporation’s management, policies or operations; and (3) such other activities as the Mississippi Commission may determine to be consistent with such investment intent.

     Any person who fails or refuses to apply for a finding of suitability or a license within 30 days after being ordered to do so by the Mississippi Commission may be found unsuitable. The same restrictions apply to a record owner of our securities if the record owner, after request, fails to identify the beneficial owner. Any person found unsuitable and who holds, directly or indirectly, any beneficial ownership of our securities beyond such time as the Mississippi Commission prescribes may be guilty of a misdemeanor. We may be subject to disciplinary action if, after receiving notice that a person is unsuitable to be a stockholder or to have any other relationship with us or any Mississippi Gaming Subsidiary owned by us, the company involved (1) pays the unsuitable person any dividend or other distribution upon such person’s voting securities; (2) recognizes the exercise, directly or indirectly, of any voting rights conferred by securities held by the unsuitable person; (3) pays the unsuitable person any remuneration in any form for services rendered or otherwise, except in certain limited and specific circumstances; or (4) fails to pursue all lawful efforts to require the unsuitable person to divest himself of the securities, including, if necessary, the immediate purchase of the securities for cash at fair market value.

     We may be required to disclose to the Mississippi Commission, upon request, the identities of the holders of our debt or other securities. In addition, under the Mississippi Act, the Mississippi Commission, in its discretion, may require the holder of any debt security of a Registered Corporation to file an application, be investigated and be found suitable to own the debt security if the Mississippi Commission has reason to believe that the holder’s ownership of such debt securities would be inconsistent with the declared policies of the State.

     Although the Mississippi Commission generally does not require the individual holders of obligations such as notes to be investigated and found suitable, the Mississippi Commission retains the discretion to do so for any reason, including but not limited to a default, or where the holder of the debt instruments exercises a material influence over the gaming operations of the entity in question. Any holder of debt securities required to apply for a finding of suitability must

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pay all investigative fees and costs of the Mississippi Commission in connection with such an investigation.

     If the Mississippi Commission determines that a person is unsuitable to own a debt security, then the Registered Corporation may be sanctioned, including the loss of its approvals, if without the prior approval of the Mississippi Commission it (1) pays to the unsuitable person any dividend, interest, or any distribution whatsoever; (2) recognizes any voting right by the unsuitable person in connection with those securities; (3) pays the unsuitable person remuneration in any form; or (4) makes any payment to the unsuitable person by way of principal, redemption, conversion, exchange, liquidation or similar transaction.

     Each Mississippi Gaming Subsidiary must maintain in Mississippi a current ledger with respect to the ownership of its equity securities and we must maintain in Mississippi a current list of our stockholders, which must reflect the record ownership of each outstanding share of any class of our equity securities. The ledger and stockholder lists must be available for inspection by the Mississippi Commission at any time. If any securities are held in trust by an agent or by a nominee, the record holder may be required to disclose the identity of the beneficial owner to the Mississippi Commission. A failure to make such disclosure may be grounds for finding the record holder unsuitable. We must also render maximum assistance in determining the identity of the beneficial owner.

     The Mississippi Act requires that the certificates representing securities of a Registered Corporation bear a legend indicating that the securities are subject to the Mississippi Act and the regulations of the Mississippi Commission. We have received from the Mississippi Commission a waiver of this legend requirement. The Mississippi Commission has the power to impose additional restrictions on the holders of our securities at any time.

     Substantially all material loans, leases, sales of securities and similar financing transactions by a Registered Corporation or a Mississippi Gaming Subsidiary must be reported to or approved by the Mississippi Commission. A Mississippi Gaming Subsidiary may not make a public offering of its securities, but may pledge or mortgage casino facilities. A Registered Corporation may not make a public offering of its securities without the prior approval of the Mississippi Commission if any part of the proceeds of the offering is to be used to finance the construction, acquisition or operation of gaming facilities in Mississippi or to retire or extend obligations incurred for those purposes. Such approval, if given, does not constitute a recommendation or approval of the investment merits of the securities subject to the offering. We have received a waiver of the prior approval requirement with respect to public offerings and private placements of securities, subject to certain conditions, including the ability of the Mississippi Commission to issue a stop order with respect to any such offering if the staff determines it would be necessary to do so.

     Under the regulations of the Mississippi Commission, a Mississippi Gaming Subsidiary may not guarantee a security issued by an affiliated company pursuant to a public offering, or pledge its assets to secure payment or performance of the obligations evidenced by securities issued by an affiliated company, without the prior approval of the Mississippi Commission. A pledge of the stock of a Mississippi Gaming Subsidiary and the foreclosure of such a pledge are ineffective without the prior approval of the Mississippi Commission. Moreover, restrictions on the transfer of an equity security issued by a Mississippi Gaming Subsidiary or its holding companies and agreements not to encumber the securities of a holding company are ineffective without the prior approval of the Mississippi Commission. We have obtained approvals from the Mississippi Commission for such guarantees, pledges and restrictions in connection with offerings of securities, subject to certain restrictions, but we must obtain separate prior approvals from the Mississippi

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Commission for pledges and stock restrictions imposed in connection with certain financing transactions. Moreover, the regulations of the Mississippi Commission require us to file a Loan to Licensees Report within 30 days following certain financing transactions and the offering of certain debt securities. If the Mississippi Commission were to deem it appropriate, the Mississippi Commission could order such transactions rescinded.

     Changes in control of us through merger, consolidation, acquisition of assets, management or consulting agreements or any act or conduct by a person by which he or she obtains control may not occur without the prior approval of the Mississippi Commission. Entities seeking to acquire control of a Registered Corporation must satisfy the Mississippi Commission in a variety of stringent standards prior to assuming control of the Registered Corporation. The Mississippi Commission also may require controlling stockholders, officers, directors and other persons having a material relationship or involvement with the entity proposing to acquire control to be investigated and licensed as part of the approval process relating to the transaction.

     The Mississippi legislature has declared that some corporate acquisitions opposed by management, repurchases of voting securities and other corporate defense tactics that affect corporate gaming licensees in Mississippi and Registered Corporations may be injurious to stable and productive corporate gaming. The Mississippi Commission has established a regulatory scheme to ameliorate the potentially adverse effects of these business practices upon Mississippi’s gaming industry and to further Mississippi’s policy to (1) assure the financial stability of corporate gaming operators and their affiliates; (2) preserve the beneficial aspects of conducting business in the corporate form; and (3) promote a neutral environment for the orderly governance of corporate affairs.

     Approvals are, in certain circumstances, required from the Mississippi Commission before a Registered Corporation may make exceptional repurchases of voting securities (such as repurchases which treat holders differently) in excess of the current market price and before a corporate acquisition opposed by management can be consummated. Mississippi’s gaming regulations also require prior approval by the Mississippi Commission of a plan of recapitalization proposed by the Registered Corporation’s board of directors in response to a tender offer made directly to the Registered Corporation’s stockholders for the purpose of acquiring control of the Registered Corporation.

     Neither we nor any Mississippi Gaming Subsidiary may engage in gaming activities in Mississippi while also conducting gaming operations outside of Mississippi without approval of the Mississippi Commission. The Mississippi Commission may require determinations that, among other things, there are means for the Mississippi Commission to have access to information concerning the out-of-state gaming operations of us and our affiliates. We previously have obtained a waiver of foreign gaming approval from the Mississippi Commission for operations in other states in which we conduct gaming operations and will be required to obtain the approval or a waiver of such approval from the Mississippi Commission prior to engaging in any additional future gaming operations outside of Mississippi.

     The Mississippi Commission has imposed on us the requirement to adopt and maintain a Company-wide gaming compliance program, and has approved our existing Gaming Compliance

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Program that was previously approved by the Nevada regulatory authorities as satisfying this requirement. See “Nevada.”

     If the Mississippi Commission were to determine that we or ACVI had violated a gaming law or regulation, the Mississippi Commission could limit, condition, suspend or revoke our approvals and the license of ACVI, subject to compliance with certain statutory and regulatory procedures. In addition, we, ACVI and the persons involved could be subject to substantial fines for each separate violation. Because of such a violation, the Mississippi Commission could attempt to appoint a supervisor to operate the casino facilities. Limitation, conditioning or suspension of any gaming license or approval or the appointment of a supervisor could (and revocation of any gaming license or approval would) materially adversely affect us, our gaming operations and our results of operations.

     License fees and taxes, computed in various ways depending on the type of gaming or activity involved, are payable to the State of Mississippi and to the counties and cities in which a Mississippi Gaming Subsidiary’s operations are conducted. Depending upon the particular fee or tax involved, these fees and taxes are payable either monthly, quarterly or annually. Gaming taxes are based upon the following: (1) a percentage of the gross gaming revenues received by the casino operation; (2) the number of gaming devices operated by the casino; or (3) the number of table games operated by the casino.

     The license fee payable to the State of Mississippi is based upon “gaming receipts” (generally defined as gross receipts less payouts to customers as winnings) and the current maximum tax rate imposed is 8% of all gaming receipts in excess of $134,000 per month. The foregoing license fees we pay are allowed as a credit against ACVI’s Mississippi income tax liability for the year paid. The gross revenues fee imposed by the City of Vicksburg equals approximately 4% of gaming receipts.

     The Mississippi Commission’s regulations require as a condition of licensure or license renewal that an existing licensed gaming establishment’s plan include a 500-car parking facility in close proximity to the casino complex and infrastructure facilities which amount to at least 25% of the casino cost. The Mississippi Commission later adopted amendments to the regulation that would increase the infrastructure development requirement from 25% to 100% for new casinos (or upon the acquisition of a closed casino), but would grandfather existing licensees. We believe that ACVI is in compliance with the previously existing infrastructure requirement and is not subject to the increased infrastructure requirement.

     The sale of alcoholic beverages at Ameristar Vicksburg is subject to licensing, control and regulation by the Alcoholic Beverage Control Division of the Mississippi State Tax Commission and by the City of Vicksburg. Ameristar Vicksburg has been designated as a special resort area, which allows ACVI to serve alcoholic beverages on a 24-hour basis. Certain officers and managers of ACVI must be investigated by the liquor license authority in connection with ACVI’s liquor permit. The liquor license authority must approve any changes in licensed positions.

     Colorado

     As prescribed by the Colorado Limited Gaming Act of 1991 (the “Colorado Act”), the ownership and operation of limited stakes gaming facilities in Colorado are subject to the

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Colorado Gaming Regulations (the “Colorado Regulations”) and final authority of the Colorado Limited Gaming Control Commission (the “Colorado Commission”). The Colorado Act also created the Colorado Division of Gaming within the Colorado Department of Revenue to license, supervise and enforce the conduct of limited stakes gaming in Colorado.

     The application of Ameristar Casino Black Hawk, Inc. (“ACBHI”) for a retail gaming license for Mountain High Casino in Black Hawk was approved by the Colorado Commission on December 16, 2004. ACBHI took possession of and began to operate Mountain High Casino on December 21, 2004.

     The Colorado Act declares public policy on limited stakes gaming to be that: (1) the success of limited stakes gaming is dependent upon public confidence and trust that licensed limited stakes gaming is conducted honestly and competitively; the rights of the creditors of licensees are protected; and gaming is free from criminal and corruptive elements; (2) public confidence and trust can be maintained only by strict regulation of all persons, locations, practices, associations and activities related to the operation of licensed gaming establishments and the manufacture or distribution of gaming devices and equipment; (3) all establishments where limited gaming is conducted and where gambling devices are operated, and all manufacturers, sellers and distributors of certain gambling devices and equipment, must therefore be licensed, controlled and assisted to protect the public health, safety, good order and the general welfare of the inhabitants of the state to foster the stability and success of limited stakes gaming and to preserve the economy, policies and free competition in Colorado; and (4) no applicant for a license or other affirmative Colorado Commission approval has any right to a license or to the granting of the approval sought. Having the authority to impose fines, the Colorado Commission has broad discretion to issue, condition, suspend for up to six months, revoke, limit or restrict at any time the following licenses: slot machine manufacturer or distributor, operator, retail gaming, support and key employee gaming licenses. With limited exceptions applicable to licensees that are publicly traded entities, no person may sell, lease, purchase, convey or acquire any interest in a retail gaming or operator license or business without the prior approval of the Colorado Commission. Any license issued or other Colorado Commission approval granted pursuant to the Colorado Act is a revocable privilege, and no holder acquires any vested rights therein.

     Pursuant to an amendment to the Colorado Constitution (the “Colorado Amendment”), limited stakes gaming became lawful in the cities of Central City, Black Hawk and Cripple Creek on October 1, 1991. Limited stakes gaming means a maximum single bet of $5 on slot machines and in the card games of blackjack and poker.

     Limited stakes gaming is confined to the commercial districts of these cities as defined by Central City on October 7, 1981, by Black Hawk on May 4, 1978, and by Cripple Creek on December 3, 1973. In addition, the Colorado Amendment restricts limited stakes gaming to structures that conform to the architectural styles and designs that were common to the areas prior to World War I, and that conform to the requirements of applicable city ordinances regardless of the age of the structures. Under the Colorado Amendment, no more than 35% of the square footage of any building and no more than 50% of any one floor of any building may be used for limited stakes gaming. Persons under the age of 21 cannot participate in limited stakes gaming. The Colorado Amendment also prohibits limited stakes gaming between the hours of 2:00 a.m. and 8:00 a.m. and allows limited stakes gaming to occur in establishments licensed to sell alcoholic beverages.

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     The Colorado Amendment requires an annual tax of up to 40% on the total amount wagered less all payouts to players. With respect to games of poker, the tax is calculated based on the sums wagered which are retained by the licensee as compensation. Annually the Colorado Commission, as mandated by the Colorado Regulations, conducts rule-making hearings concerning the gaming tax rate and device fee rate for the subsequent gaming year. However, rigid compliance with the Colorado Regulations is not mandatory and shall in no way be construed to limit the time periods or subject matters which the Colorado Commission may consider in determining the various tax rates. The current gaming tax rate structure, which has been in effect since 1999 is:

     The City of Black Hawk also assesses monthly device fees that are based on the number of slot machines operated.

     The Colorado Commission has enacted Rule 4.5, which imposes requirements on publicly traded corporations holding gaming licenses in Colorado and on gaming licenses owned directly or indirectly by a publicly traded corporation, whether through a subsidiary or intermediary company. The term “publicly traded corporation” includes corporations, firms, limited liability companies, trusts, partnerships and other forms of business organizations. Such requirements automatically apply to any ownership interest held by a publicly traded corporation, holding company or intermediary company thereof, where the ownership interest directly or indirectly is, or will be upon approval of the Colorado Commission, 5% or more of the entire licensee. In any event, if the Colorado Commission determines that a publicly traded corporation or a subsidiary, intermediary company or holding company has the actual ability to exercise influence over a licensee, regardless of the percentage of ownership possessed by such entity, the Colorado Commission may require the entity to comply with the disclosure regulations contained in Rule 4.5.

     Under Rule 4.5, gaming licensees, affiliated companies and controlling persons commencing a public offering of voting securities must notify the Colorado Commission no later than 10 business days after the initial filing of a registration statement with the Securities and Exchange Commission. Licensed publicly traded corporations are also required to send proxy statements to the Division of Gaming within five days after their distribution. Licensees to whom Rule 4.5 applies must include in their charter documents provisions that restrict the rights of the licensees to issue voting interests or securities except in accordance with the Colorado Act and the Colorado Regulations; limit the rights of persons to transfer voting interests or securities of licensees except in accordance with the Colorado Act and the Colorado Regulations; and provide that holders of voting interests or securities of licensees found unsuitable by the Colorado

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Commission may, within 60 days of such finding of unsuitability, be required to sell their interests or securities back to the issuer at the lesser of the cash equivalent of the holders’ investment or the market price as of the date of the finding of unsuitability. Alternatively, the holders may, within 60 days after the finding of unsuitability, transfer the voting interests or securities to a suitable person, as determined by the Colorado Commission. Until the voting interests or securities are held by suitable persons, the issuer may not pay dividends or interest, the securities may not be voted and may not be included in the voting or securities of the issuer, and the issuer may not pay any remuneration in any form to the holders of the securities.

     Pursuant to Rule 4.5, persons who acquire direct or indirect beneficial ownership of (a) 5% or more of any class of voting securities of a publicly traded corporation that is required to include in its articles of incorporation the Rule 4.5 charter language provisions; or (b) 5% or more of the beneficial interest in a gaming licensee directly or indirectly through any class of voting securities of any holding company or intermediary company of a licensee, referred to as qualifying persons, shall notify the Division of Gaming within 10 days of such acquisition, are required to submit all requested information and are subject to a finding of suitability as required by the Division of Gaming or the Colorado Commission. Licensees also must notify any qualifying persons of these requirements. A qualifying person other than an institutional investor whose interest equals 10% or more must apply to the Colorado Commission for a finding of suitability within 45 days after acquiring such securities. Licensees must also notify any qualifying persons of these requirements. Whether or not notified, qualifying persons are responsible for complying with these requirements.

     A qualifying person who is an institutional investor under Rule 4.5 and who, individually or in association with others, acquires, directly or indirectly, the beneficial ownership of 15% or more of any class of voting securities must apply to the Colorado Commission for a finding of suitability within 45 days after acquiring such interests.

     The Colorado Regulations provide for exemption from the requirements for a finding of suitability when the Colorado Commission finds such action to be consistent with the purposes of the Colorado Act.

     Pursuant to Rule 4.5, persons found unsuitable by the Colorado Commission must be removed from any position as an officer, director or employee of a licensee, or from a holding or intermediary company. Such unsuitable persons also are prohibited from any beneficial ownership of the voting securities of any such entities. Licensees, or affiliated entities of licensees, are subject to sanctions for paying dividends or distributions to persons found unsuitable by the Colorado Commission, or for recognizing voting rights of, or paying a salary or any remuneration for services to, unsuitable persons. Licensees or their affiliated entities also may be sanctioned for failing to pursue efforts to require unsuitable persons to relinquish their interest. The Colorado Commission may determine that anyone with a material relationship to, or material involvement with, a licensee or an affiliated company must apply for a finding of suitability or must apply for a key employee license.

     The Colorado Regulations require that every officer, director and stockholder of private corporations or equivalent office or ownership holders for non-corporate applicants, and every officer, director or stockholder holding either a 5% or greater interest or controlling interest of a publicly traded corporation or owners of an applicant or licensee, shall be a person of good moral character and submit to a full background investigation conducted by the Division of Gaming and

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the Colorado Commission. The Colorado Commission may require any person having an interest in a license to undergo a full background investigation and pay the cost of investigation in the same manner as an applicant.

     The sale of alcoholic beverages in gaming establishments is subject to strict licensing, control and regulation by State and local authorities. Alcoholic beverage licenses are revocable and nontransferable. State and local licensing authorities have full power to limit, condition, suspend for as long as six months or revoke any such licenses.

     There are various classes of retail liquor licenses which may be issued under the Colorado Liquor Code. A gaming licensee may sell malt, vinous or spirituous liquors only by the individual drink for consumption on the premises. An application for an alcoholic beverage license in Colorado requires notice, posting and a public hearing before the local liquor licensing authority prior to approval. The Colorado Department of Revenue’s Liquor Enforcement Division must also approve the application. ACBHI has been approved for a liquor restaurant license by both the local Black Hawk licensing authority and the State Division of Liquor Enforcement for Mountain High Casino.

     Nevada

     The ownership and operation of casino gaming facilities in Nevada are subject to: (1) the Nevada Gaming Control Act and the regulations promulgated thereunder (collectively, the “Nevada Act”); and (2) various local regulations. Our operations are subject to the licensing and regulatory control of the Nevada Gaming Commission (“Nevada Commission”), the Nevada State Gaming Control Board (“Nevada Board”), and the Liquor Board of Elko County. The Nevada Commission, the Nevada Board and the Liquor Board of Elko County are collectively referred to in this section as the “Nevada Gaming Authorities.”

     The laws, regulations and supervisory procedures of the Nevada Gaming Authorities are based upon declarations of public policy which are concerned with, among other things, (1) the prevention of unsavory or unsuitable persons from having a direct or indirect involvement with gaming at any time or in any capacity; (2) the establishment and maintenance of effective controls over the financial practices of licensees, including the establishment of minimum procedures for internal fiscal affairs and the safeguarding of assets and revenues; (3) providing reliable record keeping and requiring the filing of periodic reports with the Nevada Gaming Authorities; (4) the prevention of cheating and fraudulent practices; and (5) providing a source of state and local revenues through taxation and licensing fees. Change in such laws, regulations and procedures could have an adverse effect on our gaming operations.

     Cactus Pete’s, Inc. (“CPI”), which owns and operates the Jackpot properties, is required to be licensed by the Nevada Gaming Authorities. The gaming licenses require the periodic payment of fees and taxes and are not transferable. Ameristar is registered by the Nevada Commission as a publicly traded corporation (a “Registered Corporation”) and has been found suitable to own the stock of CPI, which is a corporate licensee (a “Corporate Licensee”) under the terms of the Nevada Act. As a Registered Corporation, Ameristar is required periodically to submit detailed financial and operating reports to the Nevada Commission and furnish any other information that the Nevada Commission may require. No person may become a stockholder of, or receive any percentage of profits from, a Corporate Licensee without first obtaining licenses and approvals from the Nevada Gaming Authorities. Ameristar and CPI have obtained from the Nevada

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Gaming Authorities the various registrations, findings of suitability, approvals, permits and licenses currently required in order to engage in gaming activities in Nevada.

     The Nevada Gaming Authorities may investigate any individual who has a material relationship to, or material involvement with, CPI or Ameristar in order to determine whether such individual is suitable or should be licensed as a business associate of a gaming licensee. Officers, directors and certain key employees of CPI must file applications with the Nevada Gaming Authorities and may be required to be licensed or found suitable by the Nevada Gaming Authorities. Officers, directors and key employees of Ameristar who are actively and directly involved in gaming activities of CPI may be required to be reviewed or found suitable by the Nevada Gaming Authorities. The Nevada Gaming Authorities may deny an application for licensing for any cause that they deem reasonable. A finding of suitability is comparable to licensing, and both require submission of detailed personal and financial information followed by a thorough investigation. The applicant for licensing or a finding of suitability must pay all the costs of the investigation. Changes in licensed positions must be reported to the Nevada Gaming Authorities, and in addition to their authority to deny an application for a finding of suitability or licensure, the Nevada Gaming Authorities have jurisdiction to disapprove a change in a corporate position.

     If the Nevada Gaming Authorities were to find an officer, director or key employee unsuitable for licensing or unsuitable to continue having a relationship with CPI or Ameristar, the companies involved would have to sever all relationships with such person. In addition, the Nevada Commission may require CPI or Ameristar to terminate the employment of any person who refuses to file appropriate applications. Determinations of suitability or of questions pertaining to licensing are not subject to judicial review in Nevada.

     CPI and Ameristar are required to submit detailed financial and operating reports to the Nevada Commission. Substantially all material loans, leases, sales of securities and similar financing transactions by Ameristar and CPI must be reported to, or approved by, the Nevada Commission.

     If it were determined that the Nevada Act was violated by CPI, the gaming licenses it holds or has applied for could be limited, denied, conditioned, suspended or revoked, subject to compliance with certain statutory and regulatory procedures. In addition, CPI, Ameristar and the persons involved could be subject to substantial fines for each separate violation of the Nevada Act at the discretion of the Nevada Commission. Further, a supervisor could be appointed by the Nevada Commission to operate CPI’s gaming properties and, under certain circumstances, earnings generated during the supervisor’s appointment (except for the reasonable rental value of the premises) could be forfeited to the State of Nevada. Limitation, conditioning or suspension of any gaming license or the appointment of a supervisor could (and denial or revocation of any gaming license would) materially adversely affect our gaming operations.

     Any beneficial holder of Ameristar’s voting securities, regardless of the number of shares owned, may be required to file an application, be investigated and have his suitability as a beneficial holder of Ameristar’s voting securities determined if the Nevada Commission has reason to believe that such ownership would otherwise be inconsistent with the declared policy of the State of Nevada. The applicant must pay all costs of investigation incurred by the Nevada Gaming Authorities in conducting any such investigation.

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     The Nevada Act requires any person who acquires beneficial ownership of more than 5% of a Registered Corporation’s voting securities to report the acquisition to the Nevada Commission. The Nevada Act requires that beneficial owners of more than 10% of a Registered Corporation’s voting securities apply to the Nevada Commission for a finding of suitability within 30 days after the Chairman of the Nevada Board mails the written notice requiring such filing. Under certain circumstances, an “institutional investor,” as defined in the Nevada Act, which acquires more than 10%, but not more than 15%, of a Registered Corporation’s voting securities may apply to the Nevada Commission for a waiver of such finding of suitability if such institutional investor holds the voting securities for investment purposes only. An institutional investor shall not be deemed to hold voting securities for investment purposes unless the voting securities were acquired and are held in the ordinary course of business as an institutional investor and not for the purpose of causing, directly or indirectly, the election of a majority of the members of the board of directors of the Registered Corporation, any change in the corporate charter, bylaws, management, policies or operations of the Registered Corporation or any of its gaming affiliates, or any other action which the Nevada Commission finds to be inconsistent with holding the Registered Corporation’s voting securities for investment purposes only. An institutional investor that has obtained a waiver may, in certain circumstances, hold up to 19% of a Registered Corporation’s voting securities and maintain its waiver for a limited period of time. Activities which are not deemed to be inconsistent with holding voting securities for investment purposes only include (1) voting on all matters voted on by stockholders; (2) making financial and other inquiries of management of the type normally made by securities analysts for informational purposes and not to cause a change in its management, policies or operations; and (3) such other activities as the Nevada Commission may determine to be consistent with such investment intent. If the beneficial holder of voting securities who must be found suitable is a corporation, partnership or trust, it must submit detailed business and financial information, including a list of beneficial owners. The applicant is required to pay all costs of investigation.

     Any person who fails or refuses to apply for a finding of suitability or a license within 30 days after being ordered to do so by the Nevada Commission or the Chairman of the Nevada Board may be found unsuitable. The same restrictions apply to a record owner if the record owner, after request, fails to identify the beneficial owner. Any stockholder found unsuitable and who holds, directly or indirectly, any beneficial ownership of the common stock of a Registered Corporation beyond such period of time as may be prescribed by the Nevada Commission may be guilty of a criminal offense. Ameristar is subject to disciplinary action if, after it receives notice that a person is unsuitable to be a stockholder or to have any other relationship with Ameristar or CPI, Ameristar (1) pays that person any dividend or interest upon voting securities of Ameristar, (2) allows that person to exercise, directly or indirectly, any voting right conferred through securities held by the person, (3) pays remuneration in any form to that person for services rendered or otherwise, or (4) fails to pursue all lawful efforts to require such unsuitable person to relinquish his voting securities including, if necessary, the immediate purchase of such voting securities by Ameristar for cash at fair market value. Additionally, the Liquor Board of Elko County has the authority to approve all persons owning or controlling the stock of any corporation controlling a gaming license within its jurisdiction.

     The Nevada Commission may, at its discretion, require the holder of any debt security of a Registered Corporation to file applications, be investigated and be found suitable to own the debt security of a Registered Corporation if it has reason to believe that such holder’s acquisition of such ownership would otherwise be inconsistent with the declared policy of the State of Nevada.

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If the Nevada Commission determines that a person is unsuitable to own such security, then pursuant to the Nevada Act, the Registered Corporation can be sanctioned, including the loss of its approvals, if without the prior approval of the Nevada Commission, it (1) pays to the unsuitable person any dividend, interest, or any distribution whatsoever; (2) recognizes any voting right by such unsuitable person in connection with such securities; (3) pays the unsuitable person remuneration in any form; or (4) makes any payment to the unsuitable person by way of principal, redemption, conversion, exchange, liquidation or similar transaction.

     Ameristar is required to maintain a current stock ledger in Nevada, which may be examined by the Nevada Gaming Authorities at any time. If any securities are held in trust by an agent or by a nominee, the record holder may be required to disclose the identity of the beneficial owner to the Nevada Gaming Authorities. A failure to make such disclosure may be grounds for finding the record holder unsuitable. Ameristar is also required to render maximum assistance in determining the identity of the beneficial owner. The Nevada Commission has the power to require Ameristar stock certificates to bear a legend indicating that the securities are subject to the Nevada Act. However, to date, the Nevada Commission has not imposed such a requirement on Ameristar.

     Ameristar may not make a public offering of its securities without the prior approval of the Nevada Commission if the securities or the proceeds therefrom are intended to be used to construct, acquire or finance gaming facilities in Nevada, or to retire or extend obligations incurred for such purposes. On March 20, 2003, the Nevada Commission granted us approval to make public offerings for a period of two years, subject to specified conditions (the “Shelf Approval”). We expect that the Nevada Commission will renew the Shelf Approval for an additional two-year period at its meeting to be held on March 24, 2005. The Shelf Approval also applies to any company we wholly own that is a publicly traded corporation or would become a publicly traded corporation pursuant to a public offering (“Affiliate”). The Shelf Approval also includes approval for CPI to guarantee any security issued by, and to hypothecate its assets to secure the payment or performance of any obligations evidenced by a security issued by, us or an Affiliate in a public offering. The Shelf Approval also includes approval to place restrictions upon the transfer of, and enter into agreements not to encumber the equity securities of, CPI. The Shelf Approval, however, may be rescinded for good cause, without prior notice upon the issuance of an interlocutory stop order by the Chairman of the Nevada Board. The Shelf Approval does not constitute a finding, recommendation or approval by the Nevada Commission or the Nevada Board as to the accuracy or adequacy of the investment merits of the securities offered. Any representation to the contrary is unlawful.

     Changes in control of Ameristar through merger, consolidation, stock or asset acquisitions, management or consulting agreements, or any act or conduct by a person whereby he obtains control may not occur without the prior approval of the Nevada Commission. Entities seeking to acquire control of a Registered Corporation must satisfy the Nevada Board and Nevada Commission in a variety of stringent standards prior to assuming control of such Registered Corporation. The Nevada Commission may also require controlling stockholders, officers, directors and other persons having a material relationship or involvement with the entity proposing to acquire control to be investigated and licensed as part of the approval process relating to the transaction.

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     The Nevada legislature has declared that some corporate acquisitions opposed by management, repurchases of voting securities and corporate defense tactics affecting Nevada Corporate Licensees, and Registered Corporations that are affiliated with those operations, may be injurious to stable and productive corporate gaming. The Nevada Commission has established a regulatory scheme to ameliorate the potentially adverse effects of these business practices upon Nevada’s gaming industry and to further Nevada’s policy to (1) assure the financial stability of Corporate Licensees and their affiliates; (2) preserve the beneficial aspects of conducting business in the corporate form; and (3) promote a neutral environment for the orderly governance of corporate affairs. Approvals are, in certain circumstances, required from the Nevada Commission before the Registered Corporation can make exceptional repurchases of voting securities above the current market price thereof and before a corporate acquisition opposed by management can be consummated. The Nevada Act also requires prior approval of a plan of recapitalization proposed by the Registered Corporation’s board of directors in response to a tender offer made directly to the Registered Corporation’s stockholders for the purposes of acquiring control of the Registered Corporation.

     Ameristar has adopted and maintains a Gaming Compliance Program (“Program”) that has been approved by the Chairman of the Nevada Board. The Program is designed to assist our efforts to maintain compliance with the gaming laws of the various jurisdictions under which we conduct our gaming operations. Under the Program, a Compliance Committee, assisted by a Compliance Officer, conducts reviews of specified types of proposed business and employment transactions and relationships and other matters related to regulatory requirements, and advises the Board of Directors and management accordingly. The Compliance Committee’s activities are designed primarily to help assure the suitability of business associations of the Company and its affiliates.

     License fees and taxes, computed in various ways depending on the type of gaming or activity involved, are payable to the State of Nevada and to the counties and cities in which the Nevada licensee’s respective operations are conducted. Depending upon the particular fee or tax involved, these fees and taxes are payable monthly, quarterly or annually and are based upon either (1) a percentage of the gross revenues received; (2) the number of gaming devices operated; or (3) the number of table games operated. A live entertainment tax is also paid by certain casino operations where entertainment is furnished in connection with admission fees, the selling or serving of food and refreshments, or the selling of merchandise.

     Any person who is licensed, required to be licensed, registered, required to be registered or is under common control with such persons (collectively, “Licensees”), and who proposes to become involved in a gaming venture outside of Nevada, is required to deposit with the Nevada Board, and thereafter maintain, a revolving fund in the amount of $10,000 to pay the expenses of investigation of the Nevada Board of their participation in such foreign gaming. The revolving fund is subject to increase or decrease at the discretion of the Nevada Commission. Thereafter, Licensees are required to comply with certain reporting requirements imposed by the Nevada Act. Licensees are also subject to disciplinary action by the Nevada Commission if they knowingly violate any laws of the foreign jurisdiction pertaining to the foreign gaming operation, fail to conduct the foreign gaming operation in accordance with the standards of honesty and integrity required of Nevada gaming operations, engage in activities or enters into associations that are harmful to the State of Nevada or its ability to collect gaming taxes and fees or employ,

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contract with or associate with a person in the foreign operation who has been denied a license or finding of suitability in Nevada on the ground of unsuitability.

     Other Jurisdictions

     We expect to be subject to rigorous regulatory standards, which may or may not be similar to the foregoing standards, in each jurisdiction in which we may seek to conduct gaming operations. There can be no assurance that statutes or regulations adopted or fees and taxes imposed by other jurisdictions will permit us to operate profitably.

     Federal Regulation of Slot Machines

     We are required to make annual filings with the U.S. Department of Justice in connection with the sale, distribution or operation of slot machines. All requisite filings for the current year have been made.

     Other Regulations

     Although it is no longer required to cruise, our Council Bluffs vessel must comply with U.S. Coast Guard requirements as to safety and must hold a Certificate of Inspection. These requirements set limits on the operation of the vessel and require that it be operated by a minimum complement of licensed personnel. Loss of the vessel’s Certificate of Inspection would preclude its use as a riverboat. Every five years, United States flagged passenger vessels operating exclusively in fresh water must conduct a thorough dry-dock inspection of underwater machinery, valves and hull. The Ameristar Council Bluffs riverboat was scheduled for its dry-dock inspection in October 2005, but we have been accepted into a U.S. Coast Guard program that will extend the dry-dock requirement until April 2008 by agreeing to undergo a thorough underwater inspection in October 2005 instead. Less stringent rules apply to permanently moored vessels like that at Ameristar Kansas City, Ameristar St. Charles and Ameristar Vicksburg. We currently intend to convert the Ameristar Council Bluffs riverboat to a permanently moored vessel.

     In order to comply with the federal Merchant Marine Act of 1936, as amended, and the federal Shipping Act of 1916, as amended, and applicable regulations thereunder, Ameristar’s Bylaws contain provisions designed to prevent persons who are not citizens of the United States from holding, in the aggregate, more than 24.9% of Ameristar’s outstanding Common Stock.

Web Access to Periodic Reports

     Our Internet website address is www.ameristar.com. We make available free of charge through our website our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and all amendments to those reports as soon as reasonably practicable after such material is electronically filed with or furnished to the Securities and Exchange Commission .

Item 2. Properties

     Ameristar St. Charles. Ameristar St. Charles is located on approximately 52 acres that we own along the west bank of the Missouri River immediately north of Interstate 70. Access to the

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property may be obtained via the Fifth Street exit on Interstate 70. Ameristar St. Charles owns various other real property in the region, including undeveloped land held for possible future wetlands remediation.

     Ameristar Kansas City. Ameristar Kansas City is located on approximately 183 acres of property that we own. The site is east of and adjacent to Interstate 435 along the north bank of the Missouri River. The site, which is approximately seven miles east of downtown Kansas City, Missouri, may be accessed via the Missouri Highway 210 exit on Interstate 435.

     Ameristar Council Bluffs. Ameristar Council Bluffs is located on an approximately 59-acre site along the bank of the Missouri River and adjacent to the Nebraska Avenue exit on Interstate 29 immediately north of the junction of Interstates 29 and 80. We own approximately 36 acres of this site and have rights to use the remaining portion of the site that is owned by the State of Iowa for a term expiring in 2045. We lease approximately one acre of the Ameristar Council Bluffs site to affiliates of Kinseth Hospitality Corporation for the operation of a 188-room limited service Holiday Inn Suites Hotel and a 96-room Hampton Inn Hotel.

     Ameristar Vicksburg. Ameristar Vicksburg is located on a site of approximately 25 acres that we own in Vicksburg along Washington Street near Interstate 20. We own or lease various other properties in the vicinity that are not part of our facility, including a service station and convenience store adjacent to our hotel that we operate.

     Mountain High Casino. Mountain High Casino is located on a site of approximately 5.7 acres that we own on the north side of Colorado Highway 119 in Black Hawk, Colorado. We own approximately 100 acres of largely hillside land across Richman Street from the casino site, a portion of which is currently used for overflow parking.

     The Jackpot Properties. We own approximately 116 acres in or around Jackpot, Nevada, including the 35-acre site of Cactus Petes and the 25-acre site of The Horseshu. The Cactus Petes and Horseshu sites are across from each other on U.S. Highway 93. We also own 306 housing units in Jackpot that support the primary operations of the Jackpot properties.

     Other. We lease office space in various locations outside of our operating properties, including our corporate offices in Las Vegas, Nevada. We own or lease other real property in various locations in the United States that is used in connection with our business.

     Substantially all of our real property collateralizes our obligations under our senior credit facilities.

Item 3. Legal Proceedings

     From time to time, we are a party to litigation, most of which arises in the ordinary course of business. We are not currently a party to any litigation that management believes would be likely to have a material adverse effect on us.

Item 4. Submission of Matters to a Vote of Security Holders

     None.

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PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

     Ameristar’s Common Stock is traded on the Nasdaq National Market under the symbol “ASCA.” The following table sets forth, for the fiscal quarters indicated, the high and low sale prices of the Common Stock, as reported by Nasdaq:

     As of March 1, 2005, there were approximately 147 holders of record of Ameristar’s Common Stock.

     We did not pay dividends on our Common Stock prior to 2004. In 2004, we paid four quarterly cash dividends of $0.125 per share on our Common Stock, for an annual total of $0.50 per share. On February 8, 2005, our Board of Directors increased the amount of the quarterly cash dividend to $0.15625 per share, commencing with the dividend paid in the first quarter of 2005.

     On December 21, 2004, we issued 58,943 shares of our Common Stock to the nine holders of the Series A and Series B Preferred Stock (the “Holders”) of Windsor Woodmont Black Hawk Resort Corp. (“Windsor Woodmont”) as partial consideration for the acquisition of the assets of Windsor Woodmont pursuant to a plan of reorganization under the Bankruptcy Code. The shares were issued in exchange for the Holders’ interests in Windsor Woodmont and were valued at $42.41 per share based on the average of the closing sale prices of the Common Stock for each of the 10 consecutive trading days ended December 20, 2004. No underwriter was involved in the transaction. The issuance was exempt from the registration requirements of the Securities Act of 1933, as amended pursuant to Section 1145(a)(1) of the Bankruptcy Code.

     Our senior credit facilities and senior subordinated notes obligate us to comply with certain covenants that place limitations on the payment of dividends. We are limited to paying an aggregate of $25.0 million for dividends and share repurchases under the senior credit facilities. Through December 31, 2004, we had paid $13.6 million for these purposes, consisting entirely of dividend payments. We anticipate seeking an amendment to the senior credit facilities in 2005 to permit us to continue to pay dividends in excess of $25.0 million. See “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations — Liquidity and

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Capital Resources” and “Note 5 – Long-term debt” of Notes to Consolidated Financial Statements.

     Item 6. Selected Financial Data

     The following data have been derived from our audited consolidated financial statements and should be read in conjunction with those statements, certain of which are included in this Report.

AMERISTAR CASINOS, INC.
CONSOLIDATED SELECTED FINANCIAL DATA

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AMERISTAR CASINOS, INC.
CONSOLIDATED SELECTED FINANCIAL DATA
(continued)

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AMERISTAR CASINOS, INC.
CONSOLIDATED SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

     The following information should be read in conjunction with our Consolidated Financial Statements and the Notes thereto included in this Report. The information in this section and in this Report generally includes forward-looking statements. See “Item 1. Business — Risk Factors.”

Overview

     We develop, own and operate casinos and related hotel, food and beverage, entertainment and other facilities, with seven properties in operation in Missouri, Iowa, Mississippi, Colorado and Nevada. Our portfolio of casinos consists of: Ameristar St. Charles (serving greater St. Louis, Missouri); Ameristar Kansas City (serving the Kansas City, Missouri metropolitan area); Ameristar Council Bluffs (serving Omaha, Nebraska and southwestern Iowa); Ameristar Vicksburg (serving Jackson, Mississippi and Monroe, Louisiana); Mountain High Casino (serving the Denver, Colorado metropolitan area); and Cactus Petes and the Horseshu in Jackpot, Nevada (serving Idaho and the Pacific Northwest). We acquired Mountain High Casino on December 21, 2004.

     Our financial results are dependent upon the number of patrons that we attract to our properties and the amounts that patrons spend per visit. Management uses various metrics to evaluate these factors. Key metrics include: “market share,” representing our share of gross gaming revenues in each of our markets other than Jackpot and our share of gaming devices in the Jackpot market (Nevada does not publish separate gaming revenue statistics for this market); “admissions,” representing the number of patrons admitted to our riverboat casinos; and “win per admission,” representing the amount of gaming revenues we generate per “admission.”

     Our quarterly and annual operating results may be affected by, among other things, competitive factors, gaming tax increases, the commencement of new gaming operations, charges associated with debt refinancing or property acquisition and disposition transactions, construction at existing facilities and weather conditions affecting our properties. Consequently, our operating results for any quarter or year are not necessarily comparable and may not be indicative of future periods’ results.

     During 2004 and 2003, the most significant factors and trends contributing to our operating performance were:

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Results of Operations

Selected Financial Measures by Property

     The following table sets forth certain information concerning our consolidated cash flows and the results of operations of our operating properties:

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     The following table presents detail of our net revenues:

     Year Ended December 31, 2004 Versus Year Ended December 31, 2003

     Net Revenues

     Consolidated net revenues for the year ended December 31, 2004 increased 9.3% over the prior year. All our properties improved their net revenues and market share in 2004 when compared to 2003. Led by a $91.7 million (14.0%) increase in slot revenues, consolidated casino revenues for 2004 increased $96.5 million, or 12.7%, from the prior year. We believe that the growth in slot revenues has been driven by our continued implementation of coinless slot technology at our Ameristar-branded properties, which are now nearly 100% coinless. In addition, we believe our continued leadership in the introduction of new-generation, lower-denomination slot machines at our Ameristar-branded properties has contributed to the improvement in slot revenues, due to the popularity of this segment of the slot market. We further believe casino revenues increased in part as a result of our continued successful implementation of our targeted marketing programs, which is evidenced by the 20.7% increase in rated play at our Ameristar-branded properties when compared to 2003. In 2004, we believe our slot product and targeted marketing efforts were the principal reasons we achieved market share leadership for the second consecutive year in all markets where we operated for a full year.

     Net revenues at Ameristar St. Charles for 2004 increased $22.3 million, or 8.7%, over the prior year. During 2004, we continued to experience revenue growth in St. Charles as a result of the expanded facility completed in August 2002, the implementation of our targeted marketing programs and the 9.3% growth year-over-year of the overall St. Louis market. In 2004, we increased our market share to 32.0% from 31.3% in 2003. Casino revenues increased $31.9 million year-over-year, led by improvements in slot revenues of $31.7 million, or 13.7%. Promotional allowances, which are reported as a reduction of revenues, increased $13.8 million, or 32.6%, in 2004 compared to 2003, in substantial part due to increased competition and our targeted marketing efforts mentioned above.

     Net revenues at Ameristar Kansas City improved by $19.6 million, or 9.1%, year-over-year. Casino revenues increased by $26.9 million due to our slot product enhancements and the benefit of a full year of operations since the introduction of the “All New Ameristar Kansas City” in September 2003. Additionally, the 2003 operating results were negatively impacted by construction disruption from the renovation and enhancement projects during the first three

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quarters of the prior year. We earned the highest market share in Kansas City, with a 35.1% share of the market in 2004 compared to 34.4% in 2003. Our results also benefited from the 10.2% growth over the prior year of the overall Kansas City market. Promotional allowances increased $10.5 million, or 27.4%, in 2004 as a result of the continued expansion of our patron base and increased competition in the market.

     At Ameristar Council Bluffs, our net revenues and market share continued to improve over the previous year. Net revenues in 2004 increased $15.1 million, or 9.6%, driven by an increase in casino revenues of $19.0 million, or 12.6%. Slot revenues improved by $18.0 million (13.8%) when compared to the prior year due to the improvements in slot product and the related technology mentioned above. Our market share increased from 39.2% in 2003 to 40.9% in 2004. In 2004, the total Council Bluffs market grew by 7.7%. Promotional allowances increased $6.4 million, or 30.6%, over 2003 in our effort to maintain our competitive advantage in the expanding market.

     At Ameristar Vicksburg, our net revenues increased $12.4 million, or 13.0%, year-over-year, in a market that grew 2.5% in 2004. Slot revenues improved $12.8 million (15.5%) when compared to the year ended December 31, 2003. Our promotional allowances increased $5.1 million, or 29.1%, in the current year due to the factors previously indicated. We improved our market share to 45.4% in 2004, which represents an increase of 4.7 percentage points over 2003.

     Our Jackpot properties’ 2004 net revenues improved by $1.3 million over the previous year. The 2.3% increase in net revenues is partially attributable to relatively milder weather conditions in 2004.

     Operating Income

     In 2004, consolidated operating income increased $19.5 million, or 14.0%, from 2003, and consolidated operating income margin improved 0.8 percentage point over 2003. The growth in operating income and operating income margin at our properties was principally the result of continued effective management of controllable costs and the operational leverage achieved from the increase in revenues noted above.

     Ameristar St. Charles increased income from operations in 2004 by $5.9 million, or 9.6%, while the change in the operating income margin was nominal. The margin was impacted by a more competitive market environment that has resulted in increased marketing and promotional costs. Additionally, the property experienced increases in employee compensation and related benefits of $3.7 million and depreciation expense of $1.0 million during 2004. The increase in depreciation expense was partially offset by savings on equipment rentals of $0.7 million.

     Operating income at Ameristar Kansas City improved $4.5 million from 2003, representing an increase of 11.0%. In 2004, operating income margin improved slightly by 0.3 percentage point over the previous year. The improvements in operating income and the related margin are partially attributable to the $1.3 million of costs incurred in 2003 in connection with the “All New Ameristar Kansas City” enhancement and renovation projects. Depreciation expense increased by $4.8 million over 2003 as a result of the newly constructed assets being in service for a full year and significant purchases of coinless slot technology. The operating results for the year ended December 31, 2003 reflected a non-recurring benefit of $1.1 million for sales and use tax refunds.

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     For the year ended December 31, 2004, Ameristar Council Bluffs reported an increase in operating income of $5.1 million, 11.2% higher than in 2003. Operating income margin also improved by 0.4 percentage point in 2004 as a result of management’s effective implementation of cost-containment initiatives during a period of revenue growth. The improvements in operating income and operating income margin occurred despite a 2.0% increase in the Iowa tax rate on gaming revenues of riverboat casinos, which became effective July 1, 2004. The improvement in the operating income margin was partially offset by higher depreciation expense of $1.4 million, due to an increase in our depreciable asset base resulting primarily from purchases of coinless slot technology during 2003.

     Ameristar Vicksburg’s operating income increased $6.4 million, or 30.1%, in 2004. The operating margin improved 3.4 percentage points year-over-year. The improvements in the 2004 operating income and margin were partially due to a combined savings of $0.9 million in equipment rental expense and legal fees as compared to 2003. Additionally, the property was negatively impacted by $0.7 million of additional impairment losses on assets held for sale during 2003.

     Operating income at our Jackpot properties improved by $0.9 million, or 11.7%, in 2004 and operating income margin increased 1.3 percentage points compared to 2003. The operating results were favorably impacted by cost-containment initiatives that were successfully implemented relating to employee compensation and entertainment fees.

     Corporate expense increased $4.1 million, or 11.1%, in 2004 as a result of the continued growth of the Company and increased development activities.

     Interest Expense

     Consolidated interest expense, net of amounts capitalized, was $57.0 million in 2004 compared $64.3 million in 2003. Total interest cost in 2004 was $58.7 million, a decrease of $7.2 million from $65.9 million in 2003. The decrease reflects: (1) a lower weighted average debt balance due to mandatory and accelerated principal reductions in 2004; (2) a lower average interest rate on our senior credit facilities year-over-year due to a further decline in the LIBOR rate; (3) a reduction in interest cost as a result of the termination of our interest rate swap agreement on March 31, 2004; and (4) a decrease in interest cost as a result of the expiration of our interest rate collar in June 2003. Capitalized interest increased slightly, from $1.6 million in 2003 to $1.7 million in 2004. Capitalized interest in 2004 primarily related to renovation and construction projects at our Council Bluffs and Vicksburg properties. In 2003, capitalized interest related primarily to the significant enhancements and renovations at Ameristar Kansas City.

     Income Tax Expense

     Our effective income tax rate was 38.6% in 2004 and 37.0% in 2003. The federal income tax statutory rate was 35.0% in both years. The differences from the statutory rate are due to state income taxes and the effect of certain expenses we incurred which are not deductible for federal income tax purposes.

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     Net Income

     Net income increased to $62.0 million for the year ended December 31, 2004 compared to $47.6 million in 2003 and diluted earnings per share increased to $2.23 in 2004 from $1.76 in 2003. Our net income and diluted earnings per share in 2004 increased primarily as a result of revenue growth and a decline in interest expense year-over-year. The improvement in net income was partially offset by increases in depreciation expense and the effective income tax rate. Diluted earnings per share were negatively impacted by a 2.6% increase in the number of weighted average diluted shares outstanding in 2004 versus 2003.

     Year Ended December 31, 2003 Versus Year Ended December 31, 2002

     Net Revenues

     Consolidated net revenues for the year ended December 31, 2003 were $782.0 million compared to $698.0 million for 2002, an increase of 12.0%, led by significant improvements at Ameristar St. Charles and Ameristar Council Bluffs. Additionally, in 2003 we achieved the highest market share in each of the markets in which we operated.

     Net revenues at Ameristar St. Charles for 2003 were $256.6 million, up $66.1 million, or 34.7%, over the prior year. We continued to experience revenue growth in St. Charles as a result of the expanded facility completed in August 2002, the implementation of our targeted marketing programs and growth in the overall St. Louis market. In 2003, we increased our market share to 31.3% from 24.4% in 2002. Casino revenues increased $68.1 million year-over-year, led by improvements in slot revenues of $59.6 million, or 34.8%. We experienced similar positive trends in food and beverage revenues, which increased $13.6 million, or 72.7%, in 2003 as a result of the additional restaurant capacity in the new facility. Promotional allowances, which are reported as a reduction of revenues, increased $17.0 million, or 67.4% in 2003 compared to 2002, in substantial part due to a larger patron base generated by the expanded facility.

     Net revenues at Ameristar Kansas City improved by $3.1 million, or 1.5%, year-over-year. Casino revenues increased modestly by $4.4 million, and were negatively impacted by construction disruption for the first three quarters of 2003. In September 2003, we completed the significant renovation and enhancement projects and introduced the “All New Ameristar Kansas City.” We experienced positive trends in net revenues following the introduction of the new facility and continued to earn the highest market share in Kansas City, with a 34.4% share of the market in 2003 compared to 34.2% in 2002. The construction disruption had less of an impact on our 2003 food and beverage revenues since most of the dining outlets were renovated early in the year. As a result, food and beverage revenues improved by $4.9 million, or 19.3%, from 2002. Promotional allowances increased $6.8 million, or 21.6%, in 2003 as a result of growth in our patron base and increased competition in the market. We continued to face increased competition from a competitor that recently completed a major expansion of its facility and from increased promotional spending by other operators.

     At Ameristar Council Bluffs, we continued to see steady increases in net revenues and market share. Net revenues in 2003 increased $11.3 million, or 7.8%, over 2002, driven by increases in casino revenues of $8.2 million, or 5.7%. The improvements in casino revenues were attributable to a higher win per admission of $55.08 in 2003 compared to $50.01 in 2002, resulting from the

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implementation of targeted marketing programs. Our market share also increased, from 37.9% in 2002 to 39.2% in 2003.

     At Ameristar Vicksburg, our net revenues increased $4.1 million, or 4.5%, year-over-year, despite an overall decline in the market of 1.7%. Two factors contributed to our revenue growth. Management believes that we benefited from a change in ownership of one of our competitors in the market in October 2003. Additionally, we continue to focus on the implementation of efficient and effective promotional allowances. As a result, we increased our casino revenues by $1.9 million year-over-year and at the same time decreased our promotional allowances by $2.3 million. Our market share increased from 39.2% in 2002 to 40.7% in 2003.

     Our Jackpot properties’ net revenues declined slightly to $58.8 million in 2003 from $59.4 million in 2002. The Jackpot properties were impacted by increased competition from a Native American gaming facility that is located closer to a portion of our market and by adverse weather conditions in the fourth quarter of 2003.

     Operating Income

     For 2003, consolidated operating income was $139.9 million, representing an increase of $24.7 million, or 21.5%, from 2002, and operating income margin improved to 17.9% from 16.5% in 2002.

     Ameristar St. Charles generated $61.3 million of income from operations during 2003, representing an increase of $30.9 million, or 101.6%, from 2002. Operating income in 2002 includes $5.8 million of preopening expenses related to the new St. Charles facility that opened in August 2002 and $4.4 million of impairment loss associated with assets held for sale that were not utilized in the new facility. Excluding these charges, operating income increased $20.7 million, or 68.1%, year-over-year. Operating income margin improved to 23.9%, from 15.9% in 2002. Our operating income margin improved steadily as a result of labor management and other cost-containment strategies that we implemented following the opening of the new facility.

     Operating income at Ameristar Kansas City declined from $41.5 million in 2002 to $40.4 million in 2003, representing a decrease of 2.7%. The decrease in operating income is attributable to construction disruption related to the significant enhancements and renovations and higher marketing and advertising expense, including $1.3 million of costs incurred to open the new dining and entertainment venues and to market and promote the “All New Ameristar Kansas City.” Depreciation and amortization expense increased by $2.1 million from 2002 as a result of newly constructed assets being placed in service and significant purchases of coinless slot technology. These increases were partially offset by an improvement in our self-funded health insurance expense of $1.1 million year-over-year as a result of a lower occurrence of claims and a benefit of $1.1 million for sales and use tax refunds recorded in 2003.

     Ameristar Council Bluffs reported operating income of $45.6 million, an increase of 18.1% from 2002. Operating income margins also improved by 2.6 percentage points to 29.1% in 2003. The improvement in operating income margin was the result of effective management of controllable costs during periods of revenue growth. These improvements in our margin were partially offset by increases in depreciation and amortization expense of $0.8 million, or 8.9%, due to an increase in our depreciable asset base resulting primarily from purchases of coinless slot technology during 2003.

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     Ameristar Vicksburg’s operating income decreased to $21.2 million in 2003 from $23.3 million in 2002. Operating margins also declined from 25.6% to 22.3% year-over-year, primarily due to increases in health insurance and legal expenses. Our self-funded health insurance expense increased to $4.0 million in 2003 from $2.6 million in 2002 due to a significant increase in the number of large claims.

     Operating income at our Jackpot properties declined by $1.8 million, or 18.4%, in 2003 and operating income margin declined to 13.6% in 2003 compared to 16.6% in 2002. The operating results were negatively impacted in 2003 by increases in health insurance expense of $0.3 million and inventory write-downs of approximately $0.5 million.

     Corporate expense increased $8.2 million, or 28.8%, in 2003 as a result of the continued growth of the Company, the consolidation of certain management functions at the corporate level, the addition of corporate staff to position us for future expansion, higher management bonuses and costs incurred in 2003 related to the unsuccessful pursuit of a corporate acquisition.

     Interest Expense

     Consolidated interest expense, net of amounts capitalized, was $64.3 million in 2003 compared $51.2 million in 2002. Total interest cost in 2003 was $65.9 million, a decrease of $3.2 million from $69.1 million in 2002. The decrease reflects: (1) a lower average interest rate on our outstanding debt due to a further decline in the LIBOR rate; (2) a reduction in interest cost as a result of the expiration of our interest rate collar in June 2003; and (3) a lower weighted average debt balance due to mandatory and accelerated principal reductions in 2003. Capitalized interest decreased from $17.9 million in 2002 to $1.6 million in 2003. Capitalized interest in 2002 primarily related to construction on the new St. Charles facility. In 2003, capitalized interest related primarily to the significant enhancements and renovations at Ameristar Kansas City.

     Income Tax Expense

     Our effective income tax rate was 37.0% in 2003 and 36.5% in 2002. The federal income tax statutory rate was 35.0% in both years. The differences from the statutory rate are due to state income taxes and the effect of certain expenses we incurred which are not deductible for federal income tax purposes.

     Net Income

     Net income increased to $47.6 million for the year ended December 31, 2003 compared to $40.5 million in 2002 and diluted earnings per share increased to $1.76 in 2003 from $1.50 in 2002. Our net income and diluted earnings per share in 2003 increased as a result of revenue growth, which was partially offset by increases in depreciation and amortization expense and interest expense year-over-year.

Liquidity and Capital Resources

Cash flows from operating activities

     Cash flows provided by operating activities were $176.5 million, $151.2 million, and $126.6 million for the years ended December 31, 2004, 2003 and 2002, respectively. The increase from 2003 to 2004 was chiefly the result of the improvements in operating income at all our properties

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during 2004 and an increase in deferred income taxes of $28.7 million. The increase was partially offset by an income tax refund of $10.7 million received during 2003. The increase from 2002 to 2003 was mainly the result of the contribution of operating income from the new Ameristar St. Charles facility as well as improvements in operating income at Ameristar Council Bluffs.

Cash flows from investing activities

     Cash flows used in investing activities were $208.7 million, $83.4 million and $241.5 million for the years ended December 31, 2004, 2003 and 2002, respectively. During 2004, we paid $114.2 million, net of $3.6 million of acquired cash, issued $2.5 million of Common Stock and assumed $2.3 million of long-term debt in connection with the acquisition of Mountain High Casino. Additionally, we incurred $89.6 million, $69.2 million and $255.5 million in capital expenditures (including capitalized interest) in 2004, 2003 and 2002, respectively. See “Liquidity” for further discussion of capital expenditures.

Cash flows from financing activities

     Cash flows provided by financing activities were $40.5 million and $164.3 million for the years ended December 31, 2004 and 2002, respectively. Cash flows used in financing activities were $80.1 million for the year ended December 31, 2003. Cash flows provided by or used in financing activities were significantly impacted by the following transactions in 2004, 2003 and 2002:

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     As a result of the 2004 transactions described above, our total long-term debt outstanding (including current maturities) increased from $716.9 million at December 31, 2003 to $766.3 million at December 31, 2004.

Capital expenditures

     Capital expenditures made in 2004 totaled $89.6 million (of which $1.7 million was capitalized interest) and included: (1) $36.9 million for slot equipment and related technology; (2) $35.2 million for long-lived assets relating to various capital maintenance at all our properties; (3) $10.9 million related to the Council Bluffs and Kansas City hotel room renovations; and (4) $6.6 for information technology projects.

     Capital expenditures in 2003 totaled $69.2 million (of which $1.6 million was capitalized interest) and included: (1) $24.8 million on the “All New Ameristar Kansas City” project, which included a completely renovated casino floor and the introduction of several new food and entertainment venues; (2) $20.4 million related to the continued implementation of coinless slot technology; (3) $6.6 million related to the total renovation of the buffet and kitchen at Ameristar Vicksburg; and (4) $17.4 million for long-lived assets relating to general capital maintenance at all of our properties.

     We incurred $255.5 million in capital expenditures in 2002, which consisted of the following: (1) $158.9 million on the new casino and entertainment facility at Ameristar St. Charles completed in August 2002; (2) $15.3 million on the 2,650-space parking garage at Ameristar Kansas City placed in service in July 2002; (3) approximately $14.8 million on the “All New Ameristar Kansas City” project; (4) capitalized interest of $17.9 million primarily related to the above projects; and (5) $48.6 million for long-lived assets relating to general capital maintenance at all of our properties.

     The senior credit facilities limit our aggregate capital expenditures in each year. For the year ended December 31, 2004, giving effect to an amendment to the credit agreement in December 2004, our maximum permitted capital expenditures were a combination of 9.5% of our consolidated gross revenues ($96.9 million) and 50% of unused permitted capitalized expenditures from 2003 ($14.5 million), totaling $111.4 million. As of December 31, 2004, we were in compliance with the capital expenditure covenant.

Liquidity

     Our principal long-term debt at December 31, 2004 consisted of our secured senior credit facilities and $380.0 million in aggregate principal amount of our 10.75% senior subordinated notes due 2009. At December 31, 2004, the senior credit facilities consisted of a $75 million revolving credit facility with no outstanding debt and term loan B-1 with $381.0 million outstanding. As of December 31, 2004, the amount of the revolving credit facility available for borrowing was $68.9 million, after giving effect to $6.1 million of outstanding letters of credit. The revolving credit facility matures on December 20, 2005.

     In February 2004, we amended the senior credit facilities. The primary elements of the amendment included: (1) the consolidation of the former revolving term loan facility, term loan A and term loan B into new term loan B-1, which matures on December 20, 2006; (2) a 0.5% reduction in the applicable interest rate margin on term loan B-1 compared to the former term

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loan B; (3) a revised repayment schedule; and (4) the ability to pay cash dividends on our common stock in a total amount of up to $25 million.

     In October 2004, we further amended our senior credit facilities in order to permit the December 21, 2004 borrowing of an additional $115.0 million under term loan B-1 of the senior credit facilities. We used the loan proceeds to fund the acquisition of Mountain High Casino.

     All mandatory principal repayments have been made through December 31, 2004. We expect to fund principal repayments from cash flows from operating activities in 2005. Significant principal repayments will be required on term loan B-1 in 2006.

     We are required to comply with various affirmative and negative financial and other covenants under the senior credit facilities and the indenture governing our senior subordinated notes. These covenants include, among other things, restrictions on the incurrence of additional indebtedness, restrictions on dividend payments and other restrictions, as well as requirements to maintain certain financial ratios and tests. As of December 31, 2004, we were in compliance with all applicable covenants.

     We anticipate that we will amend or replace the senior credit facilities during the second half of 2005. While we believe we will be able to do so on attractive terms, we cannot give assurance of this. Without any change to the senior credit facilities, it is likely that we would violate covenants relating to permitted dividend payments, the maximum senior debt ratio and permitted capital expenditures during the second half of 2005.

     In 2004, we made federal and state tax payments, net of $0.5 million in state tax refunds, of $3.4 million. In January 2003, we received a $10.7 million federal income tax refund related to the 2002 tax year as our actual taxable income for the year was significantly lower than the estimates used to calculate quarterly installments. Additionally, in 2003 we made federal and state tax payments, net of $0.2 million in state tax refunds, of $2.3 million. In 2002, we paid $10.7 million in estimated federal income tax payments through quarterly installments. At December 31, 2004, we had available $74.6 million of federal and $263.3 million of state unused operating loss carryforwards that may be applied against future taxable income, including tax cash payments that we are required to make in 2005.

     We intend to utilize earnings to fund the operation of our business, to service and repay our debt, to fund internal development projects, to invest in future growth opportunities that diversify our revenues and to pay cash dividends on our Common Stock. Our capital expenditures in 2005 are expected to be approximately $260.0 million. We anticipate spending approximately $60.0 million on maintenance capital expenditures (including the acquisition of slot machines and other long-lived assets) and approximately $200.0 million on internal expansion projects. Actual 2005 capital expenditures will depend on the start date of certain projects and the progress of construction through year-end. Our planned internal expansion projects include: (1) the reconfiguration and expansion of the gaming area, additional covered parking, an upgrade of the food and beverage outlets and construction of a 300-room AAA Four Diamond-quality hotel at our newly acquired Mountain High Casino property; (2) the renovation of hotel rooms at our Council Bluffs and Kansas City properties, which began in the fourth quarter of 2004; (3) the expansion of our gaming space at Ameristar Council Bluffs and Ameristar Vicksburg to accommodate increases of 300 and 200 slot machines, respectively, and the addition of a poker room at both properties; and (4) the construction of a 300-room, all-suite hotel, 20,000 square

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feet of meeting facilities, a new 1,300-seat entertainment pavilion and an additional parking garage at Ameristar St. Charles. We anticipate the benefit associated with these internal growth projects will primarily be realized commencing in 2006 and that we will experience construction disruption from the projects that will negatively impact our financial results in 2005.

     In April 2004, the Iowa legislature approved an increase in the maximum tax rate on gaming revenues of riverboat casinos from 20% to 22%, effective July 1, 2004. We will also be required to pay a special additional assessment of approximately $3.6 million in each of 2005 and 2006, which is recoverable as a credit against future gaming taxes beginning in 2010. This tax increase will negatively impact operating income at Ameristar Council Bluffs in future periods.

     Historically, we have funded our daily operations through net cash provided by operating activities and our significant capital expenditures primarily through operating cash flows, bank debt and other debt financing. It is possible that our cash flows from operations, cash and cash equivalents and availability under our senior credit facilities will not be able to support our operations and liquidity requirements, including all of our currently planned capital expenditures. If our existing sources of cash are insufficient to meet such needs, we will be required to seek additional borrowings or scale back our capital plans. While we believe we will have access to additional funds on attractive terms, we cannot provide assurance of that. Any loss from service of our riverboat and barge facilities for any reason could materially adversely affect us, including our ability to fund daily operations and to satisfy debt covenants. Our ability to borrow funds under our senior credit facilities at any time is primarily dependent upon the amount of our EBITDA, as defined for purposes of our senior credit facilities, for the preceding four fiscal quarters. As of December 31, 2004, in addition to the $68.9 million available for borrowing under the senior credit facilities, we had $86.5 million of cash and cash equivalents, approximately $48 million of which were required for daily operations.

Off-Balance Sheet Arrangements

     We do not have any off-balance sheet arrangements as defined in Item 303(a)(4)(ii) of Securities and Exchange Commission Regulation S-K.

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Contractual and Other Commitments

     The following table summarizes our material obligations and commitments to make future payments under certain contracts, including long-term debt obligations, capitalized leases, operating leases and certain construction contracts.

     We were not required to make significant cash payments for federal income taxes during the past three years due to the utilization of net operating loss carryforwards. In addition, the alternative minimum tax credit of approximately $2.6 million at December 31, 2004 can be carried forward indefinitely to reduce future federal income tax liabilities. We anticipate making increased cash tax payments in 2005. The Internal Revenue Service is currently conducting an examination of our federal tax returns for 1998 through 2001. The amount of our cash tax payments required in 2005 will be determined in part by the outcome of the IRS examination, which may result in a reduction of the currently available net operating loss carryforwards. We do not expect our cash tax payments in 2005 to exceed $30.0 million.

     Another significant operating use of cash in 2005 is interest payments. Our cash interest payments, excluding capitalized interest, were $54.3 million, $62.2 million and $63.3 million for the years ended December 31, 2004, 2003 and 2002, respectively. We expect our cash interest payments to increase in 2005 as a result of an anticipated larger average outstanding debt balance as compared to 2004, which is further described in “Note 5 – Long-term debt” of Notes to Consolidated Financial Statements.

     We routinely enter into operational contracts in the ordinary course of our business, including construction contracts for minor projects that are not material to our business or financial condition as a whole. Our commitments relating to these contracts are recognized as liabilities in our consolidated balance sheets when services are provided with respect to such contracts.

     During December 2000, we assumed several agreements with the Missouri 210 Highway Transportation Development District (“Development District”) that had been entered into in

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order to assist the Development District in the financing of a highway improvement project in the area around the Ameristar Kansas City property. In order to pay for the highway improvement project, the Development District issued revenue bonds totaling $9.0 million in principal amount with scheduled maturities from 2006 through 2011. We have issued an irrevocable standby letter of credit with a bank in support of obligations of the Development District for certain principal and interest on the revenue bonds. The amount outstanding under this letter of credit was $4.4 million as of December 31, 2004 and may be subsequently reduced as principal and interest mature under the revenue bonds. Additionally, we are obligated to pay any shortfall in the event that amounts on deposit are insufficient to cover the obligations under the bonds as well as any costs incurred by the Development District that are not payable from the taxed revenues used to satisfy the bondholders. Through December 31, 2004, we had paid $0.7 million in shortfalls and other costs. As required by the agreements, we anticipate that we will be reimbursed for these shortfall payments by the Development District from future available cash flow, as defined, and have recorded a corresponding receivable as of December 31, 2004.

     At December 31, 2004, we had outstanding letters of credit in the amount of $6.1 million, which reduced the amount available to borrow under our senior credit facilities. We do not have any other guarantees, contingent commitments or other material liabilities that are not reflected on our consolidated balance sheets. For more information, see “Note 5 – Long-term debt” of Notes to Consolidated Financial Statements.

Critical Accounting Policies and Estimates

     Management’s discussion and analysis of our results of operations and liquidity and capital resources are based on our consolidated financial statements. To prepare our consolidated financial statements in accordance with accounting principles generally accepted in the United States of America, we must make estimates and assumptions that affect the amounts reported in the consolidated financial statements. We regularly evaluate these estimates and assumptions, particularly in areas we consider to be critical accounting estimates, where changes in the estimates and assumptions could have a material impact on our results of operations, financial position and, generally to a lesser extent, cash flows. Senior management and the Audit Committee of our Board of Directors have reviewed the disclosures included herein about our critical accounting estimates, and have reviewed the processes to determine those estimates.

Property and Equipment

     We have significant capital invested in our property and equipment, which represents approximately 80% of our total assets. Judgments are made in determining the estimated useful lives of assets, salvage values to be assigned to assets and if or when an asset has been impaired. The accuracy of these estimates affects the amount of depreciation expense recognized in our financial results and the extent to which we have a gain or loss on the disposal of the asset. We assign lives to our assets based on our standard policy, which we believe is representative of the useful life of each category of assets. We review the carrying value of our property and equipment whenever events and circumstances indicate that the carrying value of an asset may not be recoverable from the estimated future cash flows expected to result from its use and eventual disposition. The factors we consider in performing this assessment include current operating results, trends and prospects, as well as the effect of obsolescence, demand, competition and other economic factors.

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Excess of Purchase Price Over Fair Value of Net Assets Acquired

     At December 31, 2004 we had approximately $79.6 million in goodwill and other intangible assets on our consolidated balance sheet resulting from our acquisition of the Missouri properties in December 2000. According to the requirements of SFAS No. 142, which we adopted on January 1, 2002, we completed our annual assessment for impairment and determined that no goodwill impairment existed. The assessment requires the use of estimates about future operating results of each reporting unit to determine its estimated fair value. Changes in forecasted operations can materially affect these estimates.

Star Awards Program

     Our customer reward program, Star Awards, allows customers to earn certain point-based cash rewards or complimentary goods and services based on the volume of the customers’ gaming activity. Customers can accumulate reward points over time that they may redeem at their discretion under the terms of the program. The reward credit balance is forfeited if a customer does not earn any reward credits over any subsequent 12-month period. As a result of the ability of the customer to bank the reward points, we accrue the expense of reward points, after giving effect to estimated forfeitures, as they are earned. At December 31, 2004 and 2003, $8.2 million and $6.6 million, respectively, were accrued. The value of these point-based cash rewards or complimentary goods and services are netted against revenue as a promotional allowance.

Cash Coupons

     Our former, current and future gaming customers may be awarded, on a discretionary basis, cash coupons based, in part, on their play volume. The coupons are provided on a discretionary basis to induce future play, are redeemable within a short time period (generally seven days) and are redeemable only on a return visit. There is no ability to renew or extend the offer. We recognize a reduction in revenue as a promotional allowance for these coupons when the coupons are redeemed.

Self-Insurance Reserves

     We are self-insured for various levels of general liability, workers’ compensation and employee medical insurance coverage. Insurance claims and reserves include accruals of estimated settlements for known claims, as well as accrued estimates of incurred but not reported claims. At December 31, 2004 and 2003, our estimated liabilities for unpaid and incurred but not reported claims totaled $7.9 million and $7.2 million, respectively. We consider historical loss experience and certain unusual claims in estimating these liabilities, based upon statistical data provided by the independent third party administrators of the various programs. We believe the use of this method to account for these liabilities provides a consistent and effective way to measure these highly judgmental accruals; however, changes in health care costs, accident or illness frequency and severity and other factors can materially affect the estimates for these liabilities.

Income Taxes

     We are subject to federal income taxes in the United States and state income taxes in several states in which we operate. We account for income taxes according to SFAS No. 109,

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“Accounting for Income Taxes.” SFAS No. 109 requires the recognition of deferred tax assets, net of applicable reserves, related to net operating loss carryforwards and certain temporary differences. The standard requires recognition of a future tax benefit to the extent that realization of such benefit is more likely than not. Otherwise, a valuation allowance is applied.

     At December 31, 2004, we had $71.7 million of deferred tax assets and $145.5 million of deferred tax liabilities. We believe that it is more likely than not that our deferred tax assets are fully realizable because of the future reversal of existing taxable temporary differences and future projected taxable income.

     Our income tax returns are subject to examination by the Internal Revenue Services and other tax authorities. We regularly assess the potential outcomes of these examinations in determining the adequacy of our provision for income taxes and our income tax liabilities. To determine necessary reserves, we must make assumptions and judgments about potential actions by taxing authorities, partially based on historical precedent. Our estimate of the potential outcome of any uncertain tax issue is highly judgmental, and we believe we have adequately provided for any reasonable and foreseeable outcomes related to uncertain tax matters. When actual results of tax examinations differ from our estimates, we adjust the income tax provision and our tax reserves in the period in which the examination issues are settled.

Recently Issued Accounting Standards

     On December 16, 2004, the FASB issued SFAS No. 123(R), “Share-Based Payment,” which is a revision to SFAS No. 123. SFAS No. 123(R) supersedes APB No. 25 and amends SFAS No. 95, “Statement of Cash Flows.” SFAS No. 123(R) requires the recognition of compensation expense in an amount equal to the fair value of share-based payments, including employee stock options and restricted stock, granted to employees. SFAS No. 123(R) will become effective for us in the quarter ending September 30, 2005.

     SFAS No. 123(R) permits companies to adopt its requirements using one of two methods:

     We are still assessing the appropriate transition method.

     The adoption of SFAS No. 123(R) will have an impact on our results of operations, but it will not have any impact on our overall financial position. We are currently evaluating the provisions of SFAS No. 123(R) to determine its impact on our future financial statements. SFAS No. 123(R) also requires the benefits of tax deductions in excess of recognized compensation cost to

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be reported as a financing cash flow, rather than as an operating cash flow. This requirement will reduce net operating cash flows and increase net financing cash flows in periods after adoption. We cannot estimate what those amounts will be in the future because they depend on, among other things, when employees exercise stock options.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

     Market risk is the risk of loss arising from adverse changes in market rates and prices, such as interest rates, foreign currency exchange rates and commodity prices. Our primary exposure to market risk is interest rate risk associated with our senior credit facilities. As of December 31, 2004, we had $381.0 million outstanding under our senior credit facilities, bearing interest at variable rates. Other than the borrowings under the senior credit facilities and $1.0 million in other long-term debt outstanding at December 31, 2004 (collectively, the “Variable Rate Debt”), all of our long-term debt bears interest at fixed rates. The Variable Rate Debt bears interest equal to LIBOR (in the case of Eurodollar loans) or the prime interest rate (in the case of base rate loans), plus an applicable margin. At December 31, 2004, the average interest rate applicable to the Variable Rate Debt was 4.4%. An increase of one percentage point in the average interest rate applicable to the Variable Rate Debt outstanding at December 31, 2004 would increase our annual interest cost by approximately $3.8 million. We continue to monitor interest rate markets and may enter into interest rate collar or swap agreements or other derivative instruments for additional amounts of principal under the senior credit facilities as market conditions warrant.

     Item 8. Financial Statements and Supplementary Data

     The Reports of the Independent Registered Public Accounting Firm appear at pages F-3 through F-5 hereof, and our Consolidated Financial Statements and Notes to Consolidated Financial Statements appear at pages F-6 through F-30 hereof.

Item 9. Changes in and Disagreements with Independent Auditors on Accounting and Financial Disclosure

     None.

Item 9A. Controls and Procedures

     (a) Evaluation of Disclosure Controls and Procedures

     As required by Rule 13a-15(b) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), the Company’s management, including our President and Chief Executive Officer and our Chief Financial Officer, has evaluated the effectiveness of our disclosure controls and procedures as of the end of the period covered by this Annual Report. Based on that evaluation, the President and Chief Executive Officer and the Chief Financial Officer have concluded that our disclosure controls and procedures (as defined in Rule 13a-15(e) under the Exchange Act) were effective as of the end of the period covered by this Annual Report.

     (b) Management’s Report on Internal Control over Financial Reporting and Report of Independent Registered Public Accounting Firm

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     The information required to be furnished pursuant to this item is set forth under the captions “Management’s Report on Internal Control over Financial Reporting” and “Report of Independent Registered Public Accounting Firm” and is included in this Annual Report at pages F-1 through F-5.

     (c) Changes in Internal Control over Financial Reporting

     As required by Rule 13a-15(d) under the Exchange Act, the Company’s management, including the our President and Chief Executive Officer and our Chief Financial Officer, has evaluated our internal control over financial reporting to determine whether any changes occurred during the fourth fiscal quarter of 2004 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. Based on that evaluation, there has been no such change during the fourth fiscal quarter of 2004.

Item 9B. Other Information

     Not applicable.

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PART III

Item 10. Directors and Executive Officers of the Registrant

     The information required by this Item will be set forth under the captions “Proposal No. 1. Election of Directors” and “Section 16(a) Beneficial Ownership Reporting Compliance” in the definitive Proxy Statement for our 2005 Annual Meeting of Stockholders (our “Proxy Statement”) to be filed with the Securities and Exchange Commission in April 2005 and is incorporated herein by this reference.

Item 11. Executive Compensation

     The information required by this Item will be set forth under the caption “Executive Compensation” in our Proxy Statement and is incorporated herein by this reference.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

     The information required by this Item will be set forth under the captions “Proposal No. 1. Election of Directors – Security Ownership of Certain Beneficial Owners and Management” and “Executive Compensation – Equity Compensation Plan Information” in our Proxy Statement and is incorporated herein by this reference.

Item 13. Certain Relationships and Related Transactions

     The information required by this Item will be set forth under the caption “Certain Transactions” in our Proxy Statement and is incorporated herein by this reference.

Item 14. Principal Accountant Fees and Services

     The information required by this Item will be set forth under the caption “Independent Registered Public Accounting Firm” in our Proxy Statement and is incorporated herein by this reference.

PART IV

Item 15. Exhibits and Financial Statement Schedules

     The following are filed as part of this Report:

     (a) 1. Financial Statements

Management’s Report on Internal Control over Financial Reporting

Reports of Independent Registered Public Accounting Firm

Consolidated Balance Sheets as of December 31, 2004 and 2003

Consolidated Statements of Operations for the years ended December 31, 2004, 2003 and 2002

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Consolidated Statements of Stockholders’ Equity and Comprehensive Income for the years ended December 31, 2004, 2003 and 2002

Consolidated Statements of Cash Flows for the years ended December 31, 2004, 2003 and 2002

Notes to Consolidated Financial Statements

     (a) 2. Financial Statement Schedules

     All schedules for which provision is made in the applicable accounting regulations of the Securities and Exchange Commission are not required under related instructions or are inapplicable and therefore have been omitted.

     (a) 3. Exhibits

     The following exhibits are filed or incorporated by reference as part of this Report. Certain of the listed exhibits are incorporated by reference to previously filed reports of ACI under the Exchange Act, including Forms 10-K, 10-Q and 8-K. These reports have been filed with the Securities and Exchange Commission under File No. 0-22494.

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SIGNATURES

     Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

     Pursuant to the requirements of the Securities Exchanges Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

S-1

     On this 16th day of March, 2005, Craig H. Neilsen directed Connie Wilson, in his presence as well as our own, to sign the foregoing document in two places as “Craig H. Neilsen.” Upon viewing the signatures as signed by Connie Wilson and in our presence, Craig H. Neilsen declared to us that he adopted them as his own signature.

     I, Margene M. Otten, Notary Public in and for said county and state, do hereby certify that Craig H. Neilsen personally appeared before me and is known or identified to me to be the President and Chief Executive Officer of Ameristar Casinos, Inc., the corporation that executed the within instrument or the person who executed the instrument on behalf of said corporation. Craig H. Neilsen, who being unable due to physical incapacity to sign his name or offer his mark, did direct Connie Wilson in his presence, as well as my own, to sign his name to the foregoing document in two places. Craig H. Neilsen, after viewing his name as signed by Connie Wilson, thereupon adopted the signatures as his own by acknowledging to me his intention to so adopt them as if he had personally executed the same both in his individual capacity and on behalf of said corporation, and further acknowledged to me that such corporation executed the same.

     IN WITNESS WHEREOF, I have hereunto set my hand and official seal this 16th day of March, 2005.

My Commission Expires: July 23, 2006

Residing at: Las Vegas, NV

S-2

MANAGEMENT’S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

Management of Ameristar Casinos, Inc. and subsidiaries (the “Company”) is responsible for establishing and maintaining adequate internal control over financial reporting. Internal control over financial reporting is a process designed under the supervision of the Company’s principal executive and principal financial officers to provide reasonable assurance regarding the reliability of financial reporting and the preparation of the Company’s financial statements for external purposes in accordance with generally accepted accounting principles.

The Company’s internal control over financial reporting includes those policies and procedures that: (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the Company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the Company are being made only in accordance with authorizations of management and directors of the Company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the Company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In conducting the Company’s evaluation of the effectiveness of its internal control over financial reporting, the Company has excluded the Mountain High Casino acquisition completed on December 21, 2004. The acquisition constituted 10% of total assets as of December 31, 2004 and less than 1% of revenues for the year then ended. Refer to Note 8 of Notes to Consolidated Financial Statements for further discussion of the Mountain High Casino acquisition and its impact on the Company’s consolidated financial statements.

The Company’s management assessed the effectiveness of the Company’s internal control over financial reporting as of December 31, 2004. In making this assessment, the Company’s management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control-Integrated Framework. Based on its assessment, management believes that, as of December 31, 2004, the Company’s internal control over financial reporting is effective based on those criteria.

The Company’s independent registered public accounting firm has audited management’s assessment of the effectiveness of the Company’s internal control over financial reporting as of December 31, 2004, as stated in their report, appearing on pages F-3 and F-4, which expresses unqualified opinions on management’s assessment and on the effectiveness of the Company’s internal control over financial reporting as of December 31, 2004.

Ameristar Casinos, Inc.
Las Vegas, Nevada
March 16, 2005

F-1

On this 16th day of March, 2005, Craig H. Neilsen directed Connie Wilson, in his presence as well as our own, to sign the foregoing document as “Craig H. Neilsen.” Upon viewing this signature as signed by Connie Wilson and in our presence, Craig H. Neilsen declared to us that he adopted it as his own signature.

I, Margene M. Otten, Notary Public in and for said county and state, do hereby certify that Craig H. Neilsen personally appeared before me and is known or identified to me to be the President and Chief Executive Officer of Ameristar Casinos, Inc., the corporation that executed the within instrument or the person who executed the instrument on behalf of said corporation. Craig H. Neilsen, who being unable due to physical incapacity to sign his name or offer his mark, did direct Connie Wilson in his presence, as well as my own, to sign his name to the foregoing document. Craig H. Neilsen, after viewing his name as signed by Connie Wilson, thereupon adopted the signature as his own by acknowledging to me his intention to so adopt it as if he had personally executed the same both in his individual capacity and on behalf of said corporation, and further acknowledged to me that such corporation executed the same.

IN WITNESS WHEREOF, I have hereunto set my hand and official seal this 16th day of March, 2005.

My Commission Expires:  July 23, 2006

Residing at:    Las Vegas, NV

F-2

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of
Ameristar Casinos, Inc.
Las Vegas, Nevada

We have audited management’s assessment, included in the accompanying Management’s Report on Internal Control Over Financial Reporting, that Ameristar Casinos, Inc. (a Nevada Corporation) and subsidiaries (the “Company”) maintained effective internal control over financial reporting as of December 31, 2004, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. As described in Management’s Report on Internal Control Over Financial Reporting, management excluded from their assessment the internal control over financial reporting at Mountain High Casino, which was acquired on December 21, 2004 and whose financial statements reflect total assets and revenues constituting 10% and less than 1%, respectively, of the related consolidated financial statement amounts as of and for the year ended December 31, 2004. Accordingly, our audit did not include the internal control over financial reporting at Mountain High Casino. The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting. Our responsibility is to express an opinion on management’s assessment and an opinion on the effectiveness of the Company’s internal control over financial reporting based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, evaluating management’s assessment, testing and evaluating the design and operating effectiveness of internal control, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed by, or under the supervision of, the company’s principal executive and principal financial officers, or persons performing similar functions, and effected by the company’s board of directors, management, and other personnel to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of the inherent limitations of internal control over financial reporting, including the possibility of collusion or improper management override of controls, material misstatements due to error or fraud may not be prevented or detected on a timely basis. Also, projections of any evaluation of the effectiveness of the internal control over financial reporting to future periods are subject to the risk that the controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

In our opinion, management’s assessment that the Company maintained effective internal control over financial reporting as of December 31, 2004, is fairly stated, in all material respects, based on the criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2004, based on the criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission.

F-3

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated financial statements as of and for the year ended December 31, 2004 of the Company and our report dated March 16, 2005, expressed an unqualified opinion on those financial statements.

DELOITTE & TOUCHE LLP

Las Vegas, Nevada
March 16, 2005

F-4

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of
Ameristar Casinos, Inc.
Las Vegas, Nevada

We have audited the accompanying consolidated balance sheets of Ameristar Casinos, Inc. (a Nevada Corporation) and subsidiaries (the “Company”) as of December 31, 2004 and 2003, and the related consolidated statements of operations, stockholders’ equity and comprehensive income, and cash flows for each of the three years in the period ended December 31, 2004. These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such consolidated financial statements present fairly, in all material respects, the financial position of Ameristar Casinos, Inc. and subsidiaries as of December 31, 2004 and 2003, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2004, in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the effectiveness of the Company’s internal control over financial reporting as of December 31, 2004, based on the criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated March 16, 2005 expressed an unqualified opinion on management’s assessment of the effectiveness of the Company’s internal control over financial reporting and an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

DELOITTE & TOUCHE LLP

Las Vegas, Nevada
March 16, 2005

F-5

AMERISTAR CASINOS, INC.
CONSOLIDATED BALANCE SHEETS
(Amounts in Thousands, Except Share Data)

The accompanying notes are an integral part of these consolidated financial statements.

F-6

AMERISTAR CASINOS, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS
(Amounts in Thousands, Except Per Share Data)