Team Fortress 2
20 hrs last two weeks / 524.2 hrs on record
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Audiosurf
3.2 hrs on record
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Commander Keen Complete Pack
Counter-Strike
Counter-Strike: Source
7.5 hrs on record
Day of Defeat
Deathmatch Classic
Doom 2
Doom 3
Doom 3: Resurrection of Evil
Final Doom
Garry's Mod
7 hrs on record
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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
6.8 hrs on record
Half-Life Deathmatch: Source
Heretic: Shadow of the Serpent Riders
Hexen
Hexen 2
Hexen: Deathkings of the Dark Citadel
Left 4 Dead
34.1 hrs on record
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Left 4 Dead 2
112.1 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
20.6 hrs on record
Master Levels of Doom II
Overlord
1.1 hrs on record
Peggle Deluxe
Portal
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Quake
0.5 hrs on record
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
Return to Castle Wolfenstein
Ricochet
Source SDK
Spear of Destiny
Team Fortress Classic
Ultimate Doom
Unreal Tournament 2004
Wolfenstein 3D
