Deleted

Where do I start:

Infamous 1 and 2
Ōkami
God Of War series
Bayonetta
The entire Devil May Cry HD collection
Shadow of the Colossus
Kingdom Hearts

IMHO the very existence of console exclusive games is an extremely asshole-ish way of making people buy those stuff instead of, for example, putting everything on the PC which more or less allows everything to be used and gives wider possibilities. :/

RDR

Uncharted, Saints Row, Eternal Darkness, Crackdown, Metal Wolf Chaos, Mercenaries, Burnout Revenge, and probably lots more.

Earthbound and subsequent titles

The Darkness 1, Fable 2, Uncharted series, Bayonetta, Heavy Rain... just off the top of my head.

Kinect games. Plus a Kinect that doesn't cost as much as an Xbox + Kinect bundle. I have an HTPC, I'd prefer using it for gaming rather than add an Xbox just for Kinect.

reddead redemption!

Infamous. Definitely Infamous. I guess Read Dead Redemption aswell :)

too many to name

God of War 1,2,3

Gears of War 2,3

Jet Set Radio Future, Virtua Fighter 5, Tekken 6, Dead or Alive (series), Uncharted (Series), Heavy Rain, Demon Souls, Darkness, Red Dead Redemption, Vanquish, Shadow Complex, God of War (serie), Shadow of Colossus. i guess thats all

HALO ALL GAMES (except halo 2, it is on PC)

Personally? Harvest Moon. I know there's technically a PC game,but I want something akin to Harvest Moon: Tree of Tranquility. <3 I can spend hours playing it. But aside from that? Marios, Zeldas, the classics, ofc.

FEZ, the newer SPelunky and Journey! Runner-ups would be Tokyo Jungle, DYAD and Retrograde.

I second the MGS collection. MGS4 made me as emotional as a baby :3

Ico
Shadow of the Colossus
Journey
Valkyrie Chronicles
Heavy Rain

Mostly what I can think of from the top of my head, I'm sure there're countless others.

fifa and WWE Smackdown vs Raw

Red Dead Redemption and Heavy Rain

Red Dead Redemption, The Last of us, and Uncharted.

Halo, Gears of War, Uncharted, Jak&Daxter, Rathet&Clank, SSMB, Mario games

Catherine, RDR, God of War

Heavy rain, red dead redemption, uncharted

Red Dead Redemption and Madden NFL

Being Xbox 360 the only console I don't own, I would say Halo and Gears of War...