Valve Corporation

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Counter-Strike
PC

Counter-Strike

Half-Life
Sony Playstation 2

Half-Life

Half-Life 2: Lost Coast
PC

Half-Life 2: Lost Coast

Half-Life Initial Encounter
PC

Half-Life Initial Encounter

Left 4 Dead
Microsoft Xbox 360

Left 4 Dead

Left 4 Dead 2
Microsoft Xbox 360

Left 4 Dead 2

Portal 2
PC

Portal 2

Team Fortress 2
PC

Team Fortress 2