Fract is a first-person puzzle game with that looks like a cross between Darwinia and a Daft Punk video. The puzzles are pretty simple - twisting knobs or pushing buttons to match patterns - but it looks stunning and the world responds in ways that makes solving those puzzles extremely rewarding.
The game isn't finished yet, but you can download a beta for Windows or Mac from the Fract site. Or skip below for more screenshots.(opens in new tab) (opens in new tab) (opens in new tab) (opens in new tab) (opens in new tab)