Team Fortress 2
9.8 hrs last two weeks / 49.9 hrs on record
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Left 4 Dead 2
1 hrs last two weeks / 1 hrs on record
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Company of Heroes
1.5 hrs on record
Condition Zero
Condition Zero Deleted Scenes
Counter-Strike
0.5 hrs on record
Counter-Strike: Source
0.9 hrs on record
Crysis
12.5 hrs on record
Darwinia
Day of Defeat
Day of Defeat: Source
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Deathmatch Classic
Half-Life
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
Half-Life: Blue Shift
Half-Life: Opposing Force
Half-Life: Source
Half-Life Deathmatch: Source
Left 4 Dead
2.4 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
Left 4 Dead Authoring Tools
Portal
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Quake
Rag Doll Kung Fu
Ricochet
Source SDK
