Metroid, in my opinion, has some of the most badass music the NES ever had. It might not have had a VRC6 sound control chip, but it DID have a well planned score for the technology availible at the time.
This one I will admit, I botched up pretty good, but made a good recovery by turning it into a soulful blues type dealie at the end. It's just the old Red Kramer and the ME-6 run into TwoTrak with WinPDrums.