Perhaps you remember Dr. Horrible's Sing-Along Blog, the tragicomic superhero musical by Joss Whedon, that dude who makes a lot of people angry because they love his shows. (Am I wrong?) Well, now you can watch Dr. Horrible... in 8-bit.
Doc Octoroc, of 8-Bit Jesus fame, is currently 2/3 of the way through reproducing Dr Horrible as an NES-style game that's actually a video that you can't technically play. Well, you can play the video, but you can't play the game.
If you've watched the original, check out Dr. Horrible's Sing-Along Game. It's strangely entertaining.