Fantasy Zone is a highly acclaimed arcade shoot 'em up developed and released by Sega in 1986. The game features Opa-Opa, a cute and quirky spaceship, as the player character navigating diverse and colorful landscapes.  Gameplay is characterized by fast-paced action, a variety of power-ups, and unique enemy designs.  The game is known for its addictive gameplay loop and charming aesthetic.  The "317-5000" designation might denote a specific ROM version or hardware revision number. Sega's influence is evident in the title's overall polish and addictive quality, showcasing their design strengths at the time.

Fantasy Zone (317-5000)

Fantastic (Galaga conversion on Galaxian hardware)