Left 4 Dead 2
8.8 hrs last two weeks / 38.4 hrs on record
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Counter-Strike: Source
5.8 hrs last two weeks / 78 hrs on record
Half-Life 2
Half-Life 2: Deathmatch
Half-Life 2: Lost Coast
Killing Floor
67.8 hrs on record
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Killing Floor Mod: Defence Alliance 2
Killing Floor SDK
Left 4 Dead
311.3 hrs on record
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Left 4 Dead 2 Demo
8.2 hrs on record
Left 4 Dead Authoring Tools
Source SDK
Team Fortress 2
0.2 hrs on record
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