Shooters: Cod Modern Warfare (the whole series), Hitman
Racing: Test Drive Unlimited, NFS Hot Pursuit, Dirt 3
RPGs: Fallout 3 and New Vegas
casualcolors has mentioned the rest I could think of.
any oldies aswell?
Racing: NFS Most Wanted, Hot Pursuit 2, Underground 1 & 2, Midtown Madness 1 & 2
RPGs: Oblivion, Avernum 1, 2, 3, Blades of Avernum (yes, they're all trial versions and very old, but they're still very enjoyable)