Chrono Trigger
Star Wars: Force Unleashed
Bayonetta
Soul Calibur IV
Left4Dead
Rock Band 2
Guitar Hero: World Tour
Brutal Legend
Fallout 3
Gears of War 2
Street Fighter IV
Super Street Fighter II Turbo HD
Castle Crashers
DS Castlevania
MadWorld
Though if were asking ONE game then I guess Rock Band 2. It's sapped enough of my life (and 360 points).