Left 4 Dead 2
19.3 hrs last two weeks / 47.1 hrs on record
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Team Fortress 2
1.2 hrs last two weeks / 13 hrs on record
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Condition Zero
Condition Zero Deleted Scenes
Counter-Strike
Counter-Strike: Source
Garry's Mod
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Half-Life
Half-Life 2
Half-Life 2: Deathmatch
0.8 hrs on record
Half-Life 2: Episode One
Half-Life 2: Episode Two
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Half-Life 2: Lost Coast
Half-Life: Blue Shift
Half-Life: Opposing Force
Half-Life Deathmatch: Source
Killing Floor
36 hrs on record
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Killing Floor Mod: Defence Alliance 2
Killing Floor SDK
Left 4 Dead
49.5 hrs on record
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Left 4 Dead 2 Add-on Support
Left 4 Dead 2 Authoring Tools
Left 4 Dead 2 Demo
1.8 hrs on record
Left 4 Dead Authoring Tools
Portal
0.7 hrs on record
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Source SDK
