http://remix.overclocked.org
OverClocked ReMix is the home to hundreds of remixed video game soundtracks. It is run and hosted by the same person that 'draws' the webcomic OverClocked.
In their own words:
"A website dedicated to reviving the video and computer game music of yesterday, and reinterpreting that of today, with new technology & capabilities."
The tracks are fan submitted, and of a very high standard. This is not just a bunch of rushed pieces; you can hear the effort that has been put into each remix, and you really need to hear a sample of them for yourself.
If a
game was
popular there's a high chance it has a remix. Any
gamer will easily find at least one
tune that they know.