Title : Counter-Strike: Source
Developer : Valve
Release Date : November 1, 2004
Languages : English, French, German, Italian, Japanese, Korean, Spanish, Russian, Simplified Chinese, Traditional Chinese, Thai

THE NEXT INSTALLMENT OF THE WORLD'S # 1 ONLINE ACTION GAME
Counter-Strike: Source blends Counter-Strike's award-winning teamplay action with the advanced technology of SourceTM technology. Featuring state of the art graphics, all new sounds, and introducing physics, Counter-Strike: Source is a must-have for every action gamer.

(Taken from steampowered.com)