Dawn. The gorgon Fleet begins a vicious attack. You defend the underwater city of Atlantis against hordes of alien invaders. Your 2 sentry outposts, the Acropolis Command Post and your flying saucer, must prevail against these ancient enemies. Use every weapon in you arsenal! Day becomes dusk, then night. Still you fight on. Your spotlights sweep the skies over Atlantis, searching for enemy aircraft. Destroy them before their death rays demolish districts of this celebrated city. Devastate their vile forces or Atlantis is doomed to become a watery grave!