Pink Floyd's Dark Side of the Moon is an all-time rock classic, but that's provided you're listening to it on a record. And maybe smashed off your face. Things are a little different when it sounds like a NES game.
This project does just that. It's called Moon8, and is the work of Canadian Brad Smith, all-round geek hero, who's not only a video game programmer (most recently on Obsidian's ill-fated Aliens RPG), but a synth musician and Wikipedia editor as well.
He's remixed the entire album in this style, and it's available for download from the project site below.