Or don't. But it's getting pretty good reviews, if not a bit mixed IMO.
Psychonauts GameSpot 8.8/10
Psychonauts TeamXBOX 9.4/10
Psychonauts 1UP 9/10
Psychonauts GamePro 4/5
Psychonauts Game Informer 8.75/10
*Ratings taken from www.gamerankings.com.*
Finally, a platformer that introduces an entirely fresh intellectual property and has managed to live up to much of the hype it's generated amongst the hardcore misfits who've followed it as long as some of us have. Looks like I'll have to pick up an Xbox sooner than I thought.
If you know nothing about the game, go to www.doublefine.com/products for a little taste, and then check out some of the various reviews popping up around the net.