"Fez" is one of the finalists in the 2008 Independent Games Festival awards. The conceit is deceptively simple: the protagonist avatar (the protavatar?) is a 2D character trapped in the 3D world. While that's been done before in games like Klonoa 2, the difference is that in Fez rotating the entire world reconfigures platforms that are out of depth on the Z-axis in 3D to still work in the plane in 2D. That doesn't make sense with me explaining it, I know, but watch the short clip and all should be clear.