The Bit.Trip series of games are always fun examples of mixing music and gameplay, and Bit.Trip Runner was probably my favorite of these. It is a relatively simple game, where a little black box of a guy named Commander Video runs along, jumping up over obstacles and onto platforms in time with the really excellent retro chiptunes as you play. Bit.Trip has been working on a sequel to Runner for a while now, and Runner2 (full title: "Bit.Trip Presents Runner2: Future Legend of Rhythm Alien") is now available on Steam for the Mac (as well as PC and Linux).
To say Runner2 is insane is an understatement -- this game is positively certifiable. The first game had a very retro feel, but this one is more like a ca