Reading over Gary Williams' review for Devil May Cry 2 just made me think about the games whose sequels did them no justice.

It's not the same as the movies where the original is USUALLY better. In gaming, there is time to fix problems, upgrade graphics, and squeeze more "new stuff" into a game. Unlike movies, it doesn't require a whole new plot.

What games come to mind when you think about sequels that fell short of their predecessors?