Rotate perspectives in a platformer

Fez has the look of a standard pixelated platformer, replete with cutesy characters and whimsical worlds. The key difference is that it gets rendered to play as a 3d game. So in a way, Fez is neither 2 dimensions or 3 dimensions, but halfway ... 2.5d !

Author : http://www.kokoromi.org/fez
Video : http://www.gameculture.com/node/337