Known to Americans as Castlevania: Dracula X: Rondo of Blood. This was suppose to come out on the Turbo-Grafx-16 but never made it here in the states.
While we did get a watered-down version on SNES this is the real deal. Better levels, more action, and pretty much better everything.
It's also one of the hardest Castlevania games as well. If you can beat Dracula at the end, consider yourself a real gamer.