Acclaimed Wiiware title BIT.TRIP BEAT hit Steam last week, and the Pong-inspired musical pixel extravaganza is now available to us for £6.29. It's a fair-sized asking price for a game with no demo and only 3 (15 minute) levels, but perhaps the video beneath will convince you. As for me, I'm automatically convinced by any game that swaps to either Mega Mode or Punishment Mode depending on how well you do.
One thing I have no idea about is whether it still supports co-op, which looks to be the best thing about the Wii version by far. Look how perfect this would be for parties!