Defend your cities against enemy attack for as long as possible. Give citizens a chance to evacuate and survive.
Enemies are attacking your cities! Command your missiles to defend your cities against enemy attack. As the commander, it is your responsibility to defend them. A variety of enemy weapons and planes will be incoming trying to destroy the five cities at the bottom of the screen. You need to fire missiles to destroy the incoming weapons. If anything gets through, one of your cities could be destroyed. When all of the cities are gone, the game is over. On each level you have ships and submarines charged with a limited amount of ammo, so make sure most (if not all) of your shots are accurate or you could temporarily run out of ammo and leave your cities at risk! As the levels progress, there are more and more enemy weapons to destroy which come in at an increasingly faster rate.