Castle of Dragon © 1990 Seta USA.
North American release. Game developed in Japan. See the original Famicom version for more information: "Dragon Unit [Model ATH=ZX]".
Desription from the back cover:
Princess Amoreena has been carried away by the evil offspring of Darklarza the Dragon Master. Geraden, Duke of Menlary, needs your help to defeat the hideous legions of the undead to secure the Instruments of Darklarza's demise.
GAME ID: NES-C4-USA
Released in June 1990 in the USA.