Dragon Unit (also known as Castle of Dragon) is an action-packed title released by Athena for the Famicom in 1990. Players control a brave knight on a quest to liberate a kingdom from dark forces. The game features side-scrolling combat where players must manage their health and weapons while fighting through varied environments. Notable for its large boss sprites and diverse weapon system, Dragon Unit provides a classic arcade-style experience on home hardware. With its dark fantasy atmosphere and challenging platforming elements, it is a great choice for fans of titles like Ghosts 'n Goblins or Rastan.