ampire Killer is the second game in the Castlevania series. It was released on October 30, 1986 for the MSX2 Home Computer roughly one month after Castlevania appeared on the Famicom Disk System. It shares strong similarities with the original game, such as graphics, music, themes for stages, items and weapons, and bosses. However, it strays very far from Castlevania's gameplay format. Instead of being a straightforward action game, Vampire Killer emphasizes exploration and puzzle elements.
Though stages follow the same themes (the first stage is the Entrance Hall, the third is the exterior of the castle) they have been entirely restructured. The level design is different and they've been turned into labyrinths. The goal of the game is to find keys that will allow entry deeper into a stage, and eventually confront and defeat the bosses found at the end of all six stages. A currency system is also employed that was not seen in Castlevania. Many of Vampire Killer's ideas were implemented into Castlevania II: Simon's Quest, though it is still notably different from that game, as well.