Don't tell me Rayman 2, cuz it looks awful (no autosave). Just a real 3D platformer--no side scroller please. Is there anything?
Rayman 2 is the closest so far (lack of autosaves be damned). I know of something similar (with a heavy dose of Metroid) in the works that is yet to be announced. Daxter is probably my favorite non-RPG game on the PSP. Sucks that it's a Sony (and PSP) exclusive.
I know I LOVED daxter too and that's why I had such high hope for rayman....but I have heard the controls are iffy and the lack of auto save sounds damn painful considering I'm a pick-up-and-play gamer--I don't have the time to play through an entire 40 minute level