Left 4 Dead 2
33.1 hrs last two weeks / 39.4 hrs on record
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Killing Floor Mod: Defence Alliance 2
0.4 hrs last two weeks / 0.4 hrs on record
Half-Life 2
Half-Life 2: Deathmatch
Half-Life 2: Episode One
Half-Life 2: Episode Two
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Half-Life 2: Lost Coast
Killing Floor
51 hrs on record
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Killing Floor SDK
Left 4 Dead
136.3 hrs on record
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Left 4 Dead 2 Add-on Support
Left 4 Dead 2 Authoring Tools
Left 4 Dead Authoring Tools
Portal
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Source SDK
Team Fortress 2
0.5 hrs on record
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