Team Fortress 2
9.6 hrs last two weeks / 1807.9 hrs on record
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Audiosurf
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Bioshock
Borderlands
70 hrs on record
Commander Keen Complete Pack
Condition Zero
Condition Zero Deleted Scenes
Counter-Strike
Counter-Strike: Source
Darkest Hour
Day of Defeat
Day of Defeat: Source
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Deathmatch Classic
Defense Grid: The Awakening
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Doom 2
Doom 3
Doom 3: Resurrection of Evil
Far Cry 2
Far Cry 2: Fortunes Pack
Final Doom
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
Heretic: Shadow of the Serpent Riders
Hexen
Hexen 2
Hexen: Deathkings of the Dark Citadel
Killing Floor
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Killing Floor Mod: Defence Alliance 2
Killing Floor SDK
Left 4 Dead
12.6 hrs on record
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Left 4 Dead 2
20.3 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
Mare Nostrum
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Mare Nostrum Dedicated Server
Master Levels of Doom II
Portal
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Quake
Quake 3 Arena
Quake 3 Team Arena
Quake II
Quake II: Ground Zero
Quake II: The Reckoning
Quake Mission Pack 1: Scourge of Armagon
Quake Mission Pack 2: Dissolution of Eternity
Red Orchestra
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Return to Castle Wolfenstein
Ricochet
Source SDK
Spear of Destiny
Team Fortress Classic
Ultimate Doom
