The Vampire hunter D's game is based on the movie itself. If you however, play the game and then watch the movie, you'll notice some holes in the game's plot. Some characters are missing, some things just happen and you're not given any explanation how or why, they just suddenly are.
The controls requires some learning and training. But the game is okay to play. Taking in note that this is a ps1 game, I'd say the graphics are rather good.
If you wish to know the whole story, watch the movie Vampire hunter D: blood-lust. If you've already seen the movie, play the game, just for the kicks of it. My rating: 6/10