So I started this game a few days ago, and it's pretty much a reason to own a PSP. I'm not kidding you. If you like puzzle games at all, seriously, get this game.
http://www.gamespot.com/video/937957...cial-trailer-1
Watch the video.
The gameplay of this game revolves around translating a 3-D enviroment into a 2D enviroment, and using that to move through the game. But that doesn't really do the gameplay justice. It one of the most monumentally unique puzzle games ever.