With its host of brain-bending puzzles and time warping, Braid is no ordinary platform game!
You’re off to save the Princess and fix your mistakes by solving puzzles. What’s awesome is that you can’t die because if you make a wrong move or an enemy beats you, just hold down the Shift key and travel back in time as far as you want to in that level. Another great aspect is that you aren’t forced to solve the puzzles as they come; you can move on and come back to them later.
Defense Grid is a science fiction tower defense game with awesome graphics and a nice variety of towers and alien enemies. It’s great because it involves strategy: there are only a few places you can build towers, so you have to exploit the best locations and balance building new towers with upgrading old ones.