JAMDAT Mobile's Tetris Debuts in Europe; Tetris Now Available to Wireless Customers Throughout United Kingdom and Across Contine

Global wireless entertainment publisher JAMDAT Mobile
Inc. (NASDAQ: JMDT) announced today the launch of Tetris(R) on
wireless carriers throughout Europe. The mobile version of the classic
puzzle game is now available in the UK on Vodafone, O2 and T-Mobile,
in Spain on Telefonica and on wireless carriers in numerous other
European countries.
   One of the most widely-played interactive games of all time,
Tetris is a simple, highly addictive puzzle game. Players attempt to
manipulate block-like pieces called "Tetriminos" as they drop into a
well. As the Tetriminos fall, players attempt to neatly arrange them
into a horizontal row. When the row is complete, it is removed from
the well and the player's score increases.
   "We are thrilled to bring Tetris to wireless subscribers
throughout the United Kingdom and across continental Europe," said
Mitch Lasky, Chairman and CEO of JAMDAT Mobile Inc. "Our European
launch is another significant step toward our goal of delivering
Tetris to wireless gamers around the world."
   "Tetris is an important title for the European market," said
Javier Ferreira, JAMDAT Mobile's Vice President of Sales and Marketing
Europe. "This world renowned game will enable us to further build on
JAMDAT's already strong presence in the UK and throughout the rest of
Europe."

   About JAMDAT Mobile

   JAMDAT Mobile Inc. 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, Tetris(R),
Downtown Texas Hold 'Em, Lemonade Tycoon(R), Bejeweled, The Lord of
the Rings(R), Tony Hawk's(R) Underground and Scrabble(R). JAMDAT
distributes its applications through wireless carriers around the
world. For more information, please visit www.jamdat.com.
   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 integrate the
acquisition of Blue Lava Wireless, anticipated growth in the handset
market, 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.