HALF-LIFE® HONORED AT MILIA
Critically-acclaimed PC Game Receives Three Prestigious Awards

BELLEVUE, WA (February 22, 2000) - Sierra Studios™ and Valve LLC announced today their PC game Half-Life captured three of the software industry's most prestigious awards at the sixth annual MILIA 2000 trade show held in Cannes, France. The gala celebration was held in the Grand Auditorium in the Palais des Festivals at the awards dinner last Thursday, February 17th. The distinction bestowed as MILIA d'Or (the golden MILIA award) acknowledged Half-Life in three categories; "Game of the Year," "Action Game of the Year," and "People's Choice Award." Over 500 products from 23 countries were registered for the awards.

Both "Game of the Year" and "Action Game of the Year" were selected by a special Games Grand Jury comprised of international industry experts. The "People's Choice Award" was selected by online votes from the general public from all the nominees. Votes were tabulated through the trade show's Website at http://www.milia.com.

"To be a part of the Half-Life phenomenon is really a joy," said Dave Grenewetzki, president of Sierra On-Line. "Having achieved such top honors from the industry, especially 'People's Choice' speaks to the quality and integrity of the game."

"In creating Half-Life, our goal was to push the boundaries of entertainment on a PC—this kind of recognition really makes all the time put into the project feel like it was worth the risks," said Gabe Newell, co-founder of Valve LLC. "We are so thankful to the gaming community, most importantly our fans, for their ongoing support."

About Half-Life:
Announced earlier this week, Half-Life will be coming to Sega's Dreamcast™ this summer and marks Sierra Studios' entrance into the console gaming market. Half-Life combines great storytelling with intense action and advanced technology to create an impressive, realistic world where players need to think smart to survive. Originally created for the PC by Valve, Half-Life has won more than 50 Game of the Year awards from publications around the world, was named "Best PC Game Ever" by Imagine Media's PC Gamer magazine (November 1999), and has sold over 1.5 million copies worldwide.

About MILIA:
An estimated 7,000 delegates representing over 2,000 companies and 1,000 exhibiting companies from all the parts of the world assembled in Cannes this past week for the MILIA 2000 trade show. The show asserts that it is the global meeting point for the world's interactive content industries.

Founded in 1996, Valve develops entertainment software. Half-Life is Valve's debut title. Since its release in November, 1998, Half-Life has won over 50 game of the year awards from publications that include PC Gamer, Computer Gaming World, and CNET's Gamecenter. Valve's upcoming title, Team Fortress 2: Brotherhood of Arms won the E3 Game Critics' Award for Best Action Game and Best Online Game. More information about Valve is available through the company's web site at http://www.valvesoftware.com.

Sierra On-Line, Inc. http://www.sierra.com/ is one of the original developers and largest worldwide publishers of interactive entertainment and productivity software. Sierra is a division of Havas Interactive, a global leader in interactive content, and is one of the world's largest publishers of education, entertainment and home productivity software. Its divisions, Blizzard®, Coktel, Knowledge Adventure®, Sierra™ and WON.net™ are famous for releasing critically acclaimed and award winning titles. Havas has operations in the US and in Europe and is a subsidiary of the French publishing house Havas, part of Vivendi Communications.