Left 4 Dead 2
5.6 hrs last two weeks / 11.6 hrs on record
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Team Fortress 2
0.3 hrs last two weeks / 9.3 hrs on record
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Commander Keen Complete Pack
Doom 2
Doom 3
0.1 hrs on record
Doom 3: Resurrection of Evil
0.7 hrs on record
Final Doom
Half-Life 2
Half-Life 2: Episode One
3.8 hrs on record
Half-Life 2: Episode Two
3.6 hrs on record
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Half-Life 2: Lost Coast
0.1 hrs on record
Heretic: Shadow of the Serpent Riders
Hexen
Hexen 2
Hexen: Deathkings of the Dark Citadel
Left 4 Dead
52.2 hrs on record
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Left 4 Dead 2 Demo
3.9 hrs on record
Left 4 Dead Authoring Tools
Master Levels of Doom II
Portal
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Quake
Quake 3 Arena
Quake 3 Team Arena
Quake II
0.2 hrs on record
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
Source SDK
Spear of Destiny
Ultimate Doom
