Alien Swarm is a game and Source SDK release from a group of talented designers at Valve who were hired from the Mod community. Available free of ch…

Left 4 Dead 2 is a cooperative first-person shooter video game, the sequel to Valve Corporation's Left 4 Dead. The Game builds upon cooperatively foc…

From Valve (the creators of Counter-Strike, Half-Life and more) comes Left 4 Dead, a co-op action horror game for the PC and Xbox 360 that casts up t…

Waking up in a seemingly empty laboratory, the player is made to complete various physics-based puzzle challenges through numerous test chambers in o…

The Orange Box is a bundle that includes five titles from Valve: Half-Life 2; Half-Life 2:Episode 1; Half-Life 2: Episode Two; Team Fortress 2, the s…

One of the most popular online action games of all time, Team Fortress 2 delivers constant free updates—new game modes, maps, equipment and, most imp…

Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play. You spawn objects and weld…

Originally planned as a section of the Highway 17 chapter of Half-Life 2, Lost Coast is a playable technology showcase that introduces High Dynamic R…

The Complete Half-Life 1 Collection. Step into the shoes of Gordon Freeman in the original Half-Life or experience different perspectives through the…

The original version of the #1 online action game in the world offers an action experience of incredible depth and realism. This Anthology also inclu…