Well, not counting digital releases:
L.A. Noire
Killzone 3 (twice, once the Limited edition, then the Helghast edition)
Deus Ex: Human Revolution (again, twice, once the limited, then the Collector's edition)
Alice: Madness Returns
Captain America: Super Soldier
Crysis 2
Marvel VS Capcom 3
Sniper: Ghost Warrior
Tom Clancy's Splinter Cell Trilogy HD
Dead Space 2
Homefront
F.E.A.R. 3
Hunted: The Demon's Forge
Knight's Contract
Operation Flashpoint: Red River
inFamous 2 (errr... again, twice, once the normal, then the Limited edition)
Mafia II
Mortal Kombat
No More Heroes: Heroes' Paradise
Transformers: Dark of the Moon
Shadows of the Damned
Tom Clancy's H.A.W.X. 2 (did it come out this year? I don't remember)
Warhammer 40.000: Space Marine
Dawn of War II Trilogy (the only PC game I bought all year. Same as last year, when I only bought Starcraft 2)
Plus a bunch of older and used games, and a lot of digital releases. And I still want:
Arkham City, MW3, BF3, Dark Souls, Ace Combat: Shattered Horizon, Uncharted 3, Resistance 3, Skyrim, ICO & SotC and the God of War Origins collection.