Which game sequels didn't fulfill your expectations this gen...

[Fab_GS]

Grand Theft Auto IV
The Sims 3
Gears of War 2
Resident Evil 5 (!!!!!!!!!!!!!!!!)
SoulCalibur IV (never played III, but it was a HUGE downgrade from II, IMO)
Call of Duty: World at War
Ninja Gaiden II
Tekken 6