From developer's official Wii version website: Overflowing with unmatched charm and character, Cave Story takes players into a world where a race of rabbit-like creatures, called Mimigas, run free on serene island. The once-carefree world is in danger of disaster at the hands of a new threat. The Mimigas' only hope is in the hands of a quiet, amnsiac boy who can't remember his own name. Players take control of the main character and learn the origins of the island's power.