Europea Universalis
Civ IV
Galactic Civilisation
Sins of a Solar Empire
Rome Total War
Medieval Total War
Empire Total War
Warhammer 40 000: Dawn of War
Dawn of War 2
Company of Heroes
The Witcher
Sims 3
Orange Box (that's Half life 2 and other things packed in)
Crysis
That's for the non console games (besides OB which was ported to them)
Then for Console/PC games that should be better on PC you have:
Oblivion
Mass effect
Fallout 3
Left 4 Dead
Batman: AA
GTA 4
Dead Space
SF4
RE5
Bioshock
Unreal Tournament 3
Call of duty 4
Call of duty WaW
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