1. Castlevania: Sales platform FC, first released on September 26, 1986 (Japanese version). In 1691 AD, an evil ritual awakened the vampire Count Dracula from his slumber, and the ensuing darkness threatened the survival of mankind. At a time of crisis, Simon Belmont, a descendant of the legendary Belmont family who fought against vampires, stepped forward and took up the legacy of his family to fight against it.
2. Castlevania: Seal of the Curse: Released on FC, the first release date is August 28, 1987 (Japanese version). The protagonist is still Simon Belmont, who was given a terrible curse when he destroyed the vampire count. Two years later, he died, possibly severing the Belmont family line. In order to prevent this from happening, Simon must summon the count and destroy him again to remove the curse.
3. Castlevania: Released on FC, the first release date is December 22, 1989 (Japanese version). "Castlevania" takes place earlier than the previous two works. Ralph Belmont of the Belmont family defeated the resurrected Count Dracula with the help of the thief Grant, the nun Sefa and the count's son Alucard (Mr. A's first appearance).
4. The Legend of Dracula: released on the GB platform, with the first release date being October 27, 1989 (Japanese version). It tells that in 1576 AD, Christopher Belmont began an adventure in order to defeat the resurrected Earl.
5. The Legend of Dracula 2: Released on GB, first release date: July 12, 1991 (Japanese version). The plot follows "The Legend of Dracula". The Count, feeling outmatched in the battle with Christopher, adopted a method of cheating death to deceive Belmont, and regained his strength in the next sixteen years. The old Christopher picked up the Holy Whip again and went to battle in order to save his son.
Baidu Encyclopedia-Castlevania