Commander Keen Complete Pack
Counter-Strike: Source
3 hrs on record
Dark Messiah Might and Magic Multi-Player
Dark Messiah Might and Magic Single Player
Deus Ex: Game of the Year Edition
16.4 hrs on record
Deus Ex: Invisible War
Doom 2
Doom 3
Doom 3: Resurrection of Evil
4.5 hrs on record
Final Doom
Garry's Mod
1.6 hrs on record
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Half-Life
0.9 hrs on record
Half-Life 2
1.3 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
Heretic: Shadow of the Serpent Riders
Hexen
Hexen 2
Hexen: Deathkings of the Dark Citadel
Master Levels of Doom II
Peggle Deluxe
0.9 hrs on record
Portal
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Quake
Quake 3 Arena
0.9 hrs on record
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
Source SDK
Spear of Destiny
Team Fortress 2
0.6 hrs on record
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Team Fortress Classic
Ultimate Doom
Uplink
