JAMDAT Mobile and Atari Launch ``YAHTZEE DELUXE'' for Wireless

    Business Editors/Entertainment Editors/Telecommunications Writers

    LOS ANGELES--(BUSINESS WIRE)--March 29, 2005--Global wireless entertainment publisher JAMDAT Mobile Inc. (NASDAQ:JMDT) and interactive games publisher Atari Interactive, Inc. (NASDAQ:ATAR) announced today the launch of "YAHTZEE DELUXE," a mobile version of the classic board game that will be available through multiple wireless carriers in the U.S. The first title to launch under an extended licensing agreement between the two companies, "YAHTZEE DELUXE" is the most complete YAHTZEE experience that can be played anytime, anywhere, all on a mobile phone.
    "YAHTZEE DELUXE" features authentic YAHTZEE gameplay as players roll dice to score points with both large and small straights, shoot for four of a kind, or the ultimate -- a Yahtzee! The game allows players to choose the strength of their computer opponent and pick from three different game types: classic, rainbow and duplicate. Simplified one-button controls allow gamers to select dice and scoring categories easily.
    "'YAHTZEE DELUXE' is our newest wireless rendition of a classic hit," said Mitch Lasky, Chairman and CEO of JAMDAT Mobile Inc. "The game, which is the first product release under our recently extended licensing agreement with Atari, enhances our wide slate of titles designed to reach the growing market of casual mobile gamers."
    "We're pleased to be working with JAMDAT to bring 'YAHTZEE DELUXE,' one of several popular Hasbro games, to mobile users everywhere," said Wim Stocks, Executive Vice President of Sales and Marketing for Atari, Inc. "By offering these games on wireless platforms and devices, we're introducing these great mass market game brands to an entirely new audience, to be played and experienced in wholly new ways."
    Game availability depends on individual phone model and wireless carrier. For specific information, JAMDAT's Game Finder is available at www.jamdat.com.

    About JAMDAT Mobile

    JAMDAT Mobile Inc. (NASDAQ:JMDT) is a global publisher of wireless entertainment applications, including games, ring tones, images and other content. JAMDAT's application portfolio is based on original and licensed intellectual properties and includes JAMDAT Bowling, Lemonade Tycoon(TM), Downtown Texas Hold 'Em, Bejeweled, The Lord of the Rings(R), Tony Hawk's(R) Underground and Scrabble(R). JAMDAT distributes its applications through wireless carriers, including Boost Mobile, Cingular Wireless, 02 (UK), Nextel, NTT DoCoMo, Orange, Sprint, Telefonica Moviles, T-Mobile, Verizon Wireless, Virgin Mobile, Vivo and Vodafone. For more information, please visit www.jamdat.com.

    About The Hasbro Properties Group

    The Hasbro Properties Group (HPG), the intellectual property development arm of Hasbro, Inc., (NYSE:HAS), translates one of the industry's richest portfolios of brands into a world of fun and excitement for children and adults globally. Through a host of publishing, lifestyle and entertainment platforms, HPG is able to surround fans worldwide with consumer products that expand Hasbro's core brands, such as G.I. JOE, TRANSFORMERS, MY LITTLE PONY, MONOPOLY and CANDY LAND, beyond the toy and game aisle, creating rich lifestyle experiences.

    Safe Harbor Statement -- JAMDAT Mobile Inc.

    This press release may include forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including statements related to anticipated revenues, expenses, earnings, operating cash flows, the outlook for JAMDAT's markets and the demand for its products. Factors that could cause JAMDAT's actual results to differ materially from these forward-looking statements include its ability to effectively market and sell products in diverse market segments, its reliance on a limited number of products and third-party vendors and distributors, its ability to expand studio operations, increases in fulfillment costs, disruptions to information technology systems, unpredictable events and circumstances relating to international suppliers, increased competition, government regulatory action and general economic conditions. Please refer to JAMDAT's reports and filings with the Securities and Exchange Commission for a further discussion of these risks and uncertainties. Readers are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date they are made. JAMDAT undertakes no obligation to update publicly any forward-looking statements to reflect new information, events or circumstances after the date they were made or to reflect the occurrence of unanticipated events.

    (C)2005 JAMDAT Mobile Inc. JAMDAT, JAMDAT Mobile and the bubbles logo are trademarks of JAMDAT Mobile Inc.
    Yahtzee Deluxe game programming code (C) 2005 Atari Interactive, Inc. All rights reserved.
    YAHTZEE is a trademark of Hasbro and is used with permission. (C) 2005 Hasbro. All Rights Reserved. Licensed by the Hasbro Properties Group.
    All other trademarks are the property of their respective owners.

--30--MR/la*

CONTACT: for JAMDAT Mobile Inc. Dena Cook, 310-566-2283 (Media Contact) dena.cook@zenogroup.com

KEYWORD: CALIFORNIA INDUSTRY KEYWORD: ENTERTAINMENT TELECOMMUNICATIONS PRODUCT MARKETING AGREEMENTS SOURCE: JAMDAT Mobile Inc.

Copyright Business Wire 2005