Left 4 Dead 2
6.4 hrs last two weeks / 18.2 hrs on record
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Team Fortress 2
0.5 hrs last two weeks / 389.3 hrs on record
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Assassin's Creed
14.7 hrs on record
Bioshock
20.2 hrs on record
Condition Zero
Condition Zero Deleted Scenes
Counter-Strike
Counter-Strike: Source
Day of Defeat
Day of Defeat: Source
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Deathmatch Classic
Half-Life
Half-Life 2
0.1 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: Source
Half-Life Deathmatch: Source
Mass Effect
12.9 hrs on record
Portal
3.1 hrs on record
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Psychonauts
9.4 hrs on record
Red Faction: Guerrilla
14.4 hrs on record
Ricochet
Source SDK
