I don't know your opinions on Sonic games, but the soundtracks to the fangames Sonic Before the Sequel and Sonic After the Sequel are some of the most high quality fangame soundtracks I've heard of in a long time. It's got that video-gamey, groovy feel, some of the songs wouldn't sound out of place in a game like Jet Set Radio or Viewpoint.
Personally, I like BtS' soundtrack a bit more, as it leans toward that groovy, electro feel more, while AtS experiments more yet relies more on techno sounds. It's all great however, and I think one of the composers works at Square now, but I'm not too sure.
Both soundtracks are 100% free, legally. There ARE FLAC versions if you're into that sort of thing, and if you're really an audiophile you can listen to the versions they have on brawlcustommusic, the brstm format. It's one of those game formats that basically doesn't fade out, so you can listen to it as long as you want.
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