Developed by indie developer Jonathan Blow and named Best Overall Puzzle Game by IGN at E3 2008, Braid is a puzzle-platformer based around the concept of manipulating time. From your house in the city, journey to a series of worlds solving puzzles that will help you rescue an abducted princess. Time behaves differently in each world, and every puzzle shows you something different about the world. The time behaviors include rewinding, independent time streams, time that is tied to space, parallel realities, time dilation, and more.
Braid will be available for 1200 MSP.