Fez

I haven't played it (I'm not really a computer games playing person these days) but I was intrigued by it - given my love of right-angles, rectangles etc - when I saw something about it on television some months ago. The game Fez presents a three dimensional world built-up primarily from cubes - as the image below shows. One can then move through this world panning and rotating as one goes.

For a review of Fez that explains more than I can, watch:

To watch actual Fez gameplay, see: