Gunpoint despite it's rather silly name; is a breath of fresh air on the stealth genre, with a unique premise and mechanic, which keeps evolving keeping the game interesting. While the game is short, the level editor is quite well designed and should offer tons of replay-ability. Gunpoint is a puzzle game, and a stealth game, it's also two dimensional, but I found the variety of solutions to various puzzles to be anything but.

Definitely worth the money, if you're into this sort of thing :3