Castlevania is a classic action-adventure game for Nintendo NES, first released in 1986. The player assumes the role of Simon Belmont, a vampire hunter whose mission is to defeat the Count Dracula in his castle full of evils. The gameplay involves platforming, exploration, and combat against various enemies using a primary weapon called 'Vampire Killer'. Simon also uses secondary weapons like daggers, holy water, and axes collected throughout levels. This game is noteworthy for its atmospheric and dark graphics, challenging gameplay, and distinctive music, which contribute to a gothic horror ambiance.