Braid 

Braid... View the trailer!

Explore the human condition and manipulate time in the lush, painterly world of Braid, a puzzle-platformer that takes you from a house in the city on a journey through a series of worlds to solve puzzles and rescue the princess. In each world, you have a different power to affect the way time behaves, including the ability to rewind, create parallel realities, and utilize time dilation. There is no filler in this game; every puzzle shows you something new and interesting about the game world.