Valve is an entertainment software company founded by Gabe Newell and Mike Harrington and based in Kirkland, Washington. Valve's debut product, Half-Life, released in November, 1998, has won more than 50 Game of the Year honors worldwide and has been called "a smash hit" by the Wall Street Journal. Half-Life was named "Best PC Game Ever" in the November 1999 issue of PC Gamer, the world's best-selling PC games magazine. Half-Life is published by Sierra Studios.

Address: 520 Kirkland Way #201, Kirkland, WA 98033 Telephone: 425-889-9642 Fax: 425-889-9642 Website: http://www.valvesoftware.com E-Mail: contact@valvesoftware.com