Mac users interested in Limbo playdead generally download:
Limbo is a great puzzle and platform game for multiple platforms. It has been recently been released for Mac OS X, but it is also available for the Xbox 360, Playstation 3 and PC. You can buy the game on Steam or the Mac App Store. I am delighted to say that Limbo runs great on the Mac and it is every bit as good as any of the other platform versions.