Please let me know of missing exclusives below in a comment! :D
Exclusive 360 line-up 2010:
Crackdown 2
Fable III
Halo: Reach
Splinter Cell Conviction
Red Dead Redemption (Maybe not exclusive?)
Mass Effect 2
Project natal (I decided to toss this in too? just to be fair)
Exclusive Count 7
Exclusive Ps3 List (Playstation 3) 2010
Agent
M.A.G.
God of War 3
The Last Guardian
Gran Turismo 5
Modnation Racers
3D Dot Game Heroes
White Knight Chronicles
Star Ocean: The Last Hope International
Possible 2010 secret releases
Twisted Metal,Starhawk, resistance 3
Exclusive Count 18
Exclusive Wii 2010
tatsunoko vs capcom
no more heroes 2
SMG 2
New Zelda
Sin and Punishment 2,
fragile
monster hunter
epic mickey
red steel 2
the grinder
shiren the wanderer
cave story
NBA jam remake
Arc Rise Fantasia
Endless Ocean 2
Gladiator A.D
Sonic & Sega All-Stars Racing
Exclusive Count 17