For those of you whom don't know already, there's a community of game music remixers that post their remixes of various games on a website called "OverClocked Remix". It's basically a website with music remixes of the songs from your favorite game franchises like Legend of Zelda, Halo, and so on that are all free for download.
You can find it at: http://www.ocremix.org/remixes/