Classic!
This game is unique for its time. You started the game in black and white and then you ask yourself "what, a b&w game?" then you beat the second boss and BANG! Colors all over your screen my man! Damn, this was such a good feature back in the day. Then you continue to beat the other bosses and gain other parts of the Hyakkimaru's body. What a good mechanic to have for the game. I know that this is from a manga/ anime, but this fits a game so well that's like it was made for this media. Don't have to say how many times I've beaten this gem!