Exclusives on X360? Whats that
?
On a serious note:
HALO series.
GEOW series.
Forza series.
Trials Evolution
Trials HD
Geometry Wars: Retro Evolved
Rez HD
Shadow Complex
PGR series.
Ikaruga
I will include games that aren't available on PS3, but are available on PC:
Alan Wake,
Witcher 2
Spelunky (I heard its great, but haven't played it).
Bastion
Not sure about other games.