RyuKyu is an arcade title. This version, identified by its ROM ID, represents a likely legitimate arcade release from Japan. More details are required to fully understand the gameplay mechanics, story, and its developer. It is different from the decrypted bootleg version which hints at the complexities and variations within the arcade releases of this game.

RyuKyu (Japan, FD1094 317-5023)

Rygar (US set 3, old version)