Full Speed Ahead! In the year 3011, only ten percent of the world's land remains above water, and the Earth Federation is under threat from the evil Chaos Empire. As the commander of the prototype super-sub Metal Fin, your mission is to battle your way through 19 missions of intense side-scrolling action to defeat the Chaos leadership. Along the way you'll take on ferocious enemies, and fearsome bosses with 12 dazzling, upgradeable weapons.