As much as I use to enjoy listening to the music off of my Mega-CD and Saturn games, personally I think it'll be a bad idea to extend the site beyond actual OSTs. Just about any game ever created has music to it. Then, as already mentioned, you have the same game released on multiple platforms. It'll just be crazy.
I personally enjoy this site as a collector of soundtracks. Even if the music can easily be ripped from the game with Groove on Fight being an example. I still got the soundtrack in appreciation of the artist's composition.
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