Counter-Strike: Source contains the latest online games from Valve.

Blending single elimination, team-based gameplay with the notion of an economy to produce an online action experience of incredible depth and realism, Counter-Strike is the most played multi-player online action game in the world. With Counter-Strike: Source, the now legendary game has been given a complete overhaul, with graphic enhancements such as higher polygon models, shadows and reflective water to add dimension to the new characters, items, and environments. CS: Source also contains all new maps.

In addition to the award-winning Counter-Strike gameplay, this game also includes Half-Life 2: Deathmatch - featuring fast action gameplay in physically simulated environments - and Day of Defeat: Source, Valve's World War II online action thriller set in the European theater of operations.