Object: Be the first to hit the enemy's coast with a Missle while defending your own coastline from attack. If you manage to destroy all your enemy's Missles and so leave their coast completely undefended, you automatically win the game.
 
A Missle can move ahead one square, either diagonally or straight ahead. It may not land on a space already occupied by another missle. A Missle may detonate, removing all Missles on the eight surrounding squares and itself.