godofallu said:
you have earned my respect and I will give you some titles:
Bad Company 2 (if you don't already own it on consoles.)
Mount and Blade: Warband (bascialy a really fun and cool medevil game simulator. has multiplayer also up to 222 players I believe. You should check it out, I believe there is a demo on steam.
Gothic 3 (buggy at release but with community patches makes the game awesome. Try it out, it has a demo and a long one at that.)
Guild Wars 2 (when it releases, check it out at Guildwars2.com XD)
the STALKER series (if you want a more realistic version of Fallout)
Titan Quest (if you like greek mythology and games like Diablo.)
Rainbow Six: Vegas 2 (this game is amazing, and people still play it on PC and on steam it is only $10!)
Baulder Gate series (if you like Bioware RPGs, though be wary this series has Dungeon and Dragons elements so you might be confused like when I first got it but still great great game.)
Team Fortress 2 (one of the best FPS on PC though don't play it much.)
Garrys Mod (bascialy a toy sandbox but you need Source engine games to run it like, TF2, Half-Life , Counter strike... etc...)
Shattered Horizon (a space FPS with zero gravity and is amazing!)
thats all the games I can think of atm.