Good games for Xbox 360?

Games Already Released but still worth it:
Bayonetta (awesome!!)
Mass Effect 2
Fallout 3
Arkham Asylum
Borderlands
Just Cause 2
Assassin's Creed 2
Resident Evil 5
Dead Space
Saints Row 2
The Saboteur
Gears of War series
Devil May Cry 4
GTA 4 and GTA Episodes from Liberty City
Splinter Cell Conviction
Battlefield Bad Company 2 or 1
Bioshock 1 and 2
F.E.A.R 1 and 2
Halo 3 and ODST
Left 4 Dead 1 and 2
Metro 2033

Upcoming Games for this year:
Serious Sam HD 4/28 <----Date of Release
Dead to RIghts Retribution 4/27
Lost Planet 2 5/11
Alan Wake 5/18
Red Dead Redemption 5/21
Alpha Protocol 5/28

You forgot Hitman: Blood Money