Lead and Gold - Gangs of the Wild West - 333.9 hrs on record
Yeah, really liked that game for some reason. I've met most people on my friends list through it.
The Elder Scrolls IV: Oblivion - 158.6 hrs on record
Looking back I didn't even like it that much.
Blacklight: Retribution - 150.4 hrs on record
F2P. Decent. Never put any money into it, earned everything I wanted. Feel kinda bad about it, but whatever.
Day of Defeat: Source - 141.1 hrs on record
Bolt action. <3
Red Orchestra 2: Heroes of Stalingrad - 139.3 hrs on record
Hardcore bolt action. <3
Team Fortress 2 - 123.5 hrs on record
Most boring game I've ever put that much time into. I probably just suck.
Neverwinter Nights 2: Platinum - 93.4 hrs on record
Counts Mask of the Betrayer as well, I think. Shouldn't have bothered with NVN2, in retrospect.
Far Cry 2 - 73.4 hrs on record
SP bolt action.
XCOM: Enemy Unknown - 64.7 hrs on record
Still haven't finished Classic Ironman. Should get back to that...
Borderlands 2 - 63.9 hrs on record
Same as Oblivion. I kinda like it, but when I'm looking back I don't know why. Sir Hammerlock's DLC is kinda shit so far, too.