I don't see The Whispered World. Up there with some of my favourite adventure games in recent years.
I think the jester actually is NiGHTS, although I may be misremembering the Wii sequel (Wiiquel?).
Oh man, me and my sister played Pandemonium! as a kid so many times. I remember it very fondly. Great game.
Thanks for the suggestions, folks. Since lists have suddenly become high profile, I imagine this'll become more common.
@yummylee: I'll just add... hey, wait a minute. That doesn't look like the clown we hir-*hurk*
@starfoxa: Wouldn't say I was "missing" Chrono Cross, necessarily... but seriously, doesn't Chrono Cross's roster kind of have at least one of everything? Seems like a cheat.