Left 4 Dead 2
3.9 hrs last two weeks / 15.7 hrs on record
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Team Fortress 2
1.6 hrs last two weeks / 182.3 hrs on record
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Condition Zero
Condition Zero Deleted Scenes
Counter-Strike
Counter-Strike: Source
30.4 hrs on record
Day of Defeat
Day of Defeat: Source
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Deathmatch Classic
F.E.A.R. 2: Project Origin
1.9 hrs on record
Half-Life
Half-Life 2
25.4 hrs on record
Half-Life 2: Deathmatch
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
Left 4 Dead
10.9 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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Ricochet
Source SDK
50.1 hrs on record
