Team Fortress 2
55.8 hrs last two weeks / 1891.2 hrs on record
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Counter-Strike: Source
5.5 hrs last two weeks / 37 hrs on record
Quake
0.3 hrs last two weeks / 0.3 hrs on record
Quake II
0.2 hrs last two weeks / 0.2 hrs on record
Audiosurf
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Commander Keen Complete Pack
Day of Defeat: Source
1.2 hrs on record
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Doom 2
Doom 3
Doom 3: Resurrection of Evil
Final Doom
Half-Life
0.1 hrs on record
Half-Life 2
0.7 hrs on record
Half-Life 2: Deathmatch
0.1 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
Heretic: Shadow of the Serpent Riders
Hexen
Hexen 2
Hexen: Deathkings of the Dark Citadel
Killing Floor
13.9 hrs on record
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Killing Floor Mod: Defence Alliance 2
Killing Floor SDK
Left 4 Dead
18.9 hrs on record
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Left 4 Dead Authoring Tools
Master Levels of Doom II
Portal
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Quake 3 Arena
Quake 3 Team Arena
Quake II: Ground Zero
Quake II: The Reckoning
Quake Mission Pack 1: Scourge of Armagon
Quake Mission Pack 2: Dissolution of Eternity
Rainbow Six Vegas 2
Return to Castle Wolfenstein
Source SDK
Spear of Destiny
Team Fortress Classic
1.4 hrs on record
Ultimate Doom
