Castlevania 1986 (also known as CastleVania 1, Akumajou Dracula, 悪魔城ドラキュラ, Akumajō Dorakyura, or Devil's Castle Dracula) is the opening work of KONAMI's whole Castlevania series video game. First released on FDS (Famicom Disk System) platform in Japan in 1986, and was transplanted to NES (Nintendo Entertainment System) platform in EU/US later in the 1987 and 1988. So it also can be called Castlevania FDS/NES.
Bunny Must Die Chelsea and the 7 Devils is a Castlevania style side-scrolling 2D action adventure doujin game. Lovely graphics genre, playful voice, ultra high difficulty (please read the sign instruction when playing for the first time, otherwise you may even do not know how to continue).
Super Castlevania IV (Japanese: 悪魔城ドラキュラ, Akumajō Dorakyura or Devil's Castle Dracula) is the only one work allows to whip in eight directions in Nintendo Castlevania series. In addition to 11 levels of straight line plot, it also provides 3 secret states for players to explore.