I can't pass up any metal cover of the original Castlevania music (nor any other type of cover to be honest). I believe the original Castlevania to have some of the strongest overall music of any game in the NES era. Comparable only to the best of the best soundtracks of the time.

Ultimate D-Pad gives the opening theme a go in this epic cover, which is also free to download, so you can headbang any time anywhere, even during a cursed, horrible night.