Dark Castle is a classic platform game that was initially released for the Macintosh in 1986 and subsequently ported to various other platforms, including the Sega Genesis in 1991. The game is known for its challenging gameplay, distinctive audio, and the use of sampled voice effects unusual for its time. Players control a character named Duncan who must navigate through a dark and treacherous castle filled with puzzles, traps, and enemies. The goal is to defeat the Black Knight and restore peace to the land. Its genre blends action with puzzle-solving elements, making for a unique gaming experience of its era.