Zanac is a vertically scrolling shooter initially released on arcade platforms. The NES port would have likely maintained the core gameplay of the arcade version, including high-speed action, dodging enemy fire, and collecting power-ups. The player likely controls a spaceship and fights waves of enemies in a futuristic setting. The port was likely done by a company holding the licensing rights and responsible for adapting the game to the NES.

Zanac (Japan)

Yuu Yuu Hakusho Final - Makai Saikyou Retsuden