Turn your Nintendo DSi system upside-down and play as the Imperial Armada out to destroy the Earth Defense Force in this topsy-turvy take on arcade shooters. You control the unsung forces of arcade shooters past with three kinds of ships, including giant bosses. Draw a line to send the fighters down. Touch the guards to make them shoot. Make your boss ship fire multiple weapons, including an enormous blast that destroys everything in its way. Two players can even battle each other on one Nintendo DSi system. Will the Earth Defense Force win again? Or will the Imperial Armada find victory at last?