Fez (360): COMPLETED!
To begin with, Fez is a Cave Story-looking 2D platformer. Then, about 5 minutes in, a thing happens and suddenly everything is 3D. Sort of. It’s still 2D but with four 2D planes, each mapped to the sides of a cube which you can freely rotate. Then it becomes a different sort of platform game, which is more puzzley (you have to figure out how to rotate the playfield to progress), and somewhat explorey as you search for cubes and …