TPS
Gears of War 1 & 2
Resident Evil 5
Ghostbusters

Western RPG
Elder Scrolls Oblivion
Mass Effect 1 & 2
Fable 2
Fallout 3
Borderlands

Survival
Dead Space

FPS
Bioshock 1 & 2
Halo Series
Call of Duty Series
Bad Company 1 & 2

Fighting
Soul Calibur 4
Tekken 6
Street Fighter 4
Blazblue

Open World
GTA 4
Prototype
Red Faction

Racing
Forza 3
Dirt 2

Others
Batman Arkham Asylum
Ninja Gaiden 2
Devil May Cry 4
Darksiders

There are a lot more than listed, can't remember all.

You just need to choose the genre you like best and pick those you're interested in.