Get ready for war! Incoming enemy ICBMs have been spotted. Your mission is to destroy all enemy ICBMs. Our government systems have been penetrated so all enemy ICBMs are directly targeted for the 5 U.S. Silos, but not to worry, the separate Top Secret Impenetrable Space Silo has our back! Dont let any ICBMs get past you as each one is guaranteed to take out a silo! While the top secret U.S. space silo is impenetrable, it will however cost you points if you come into contact with enemy fire! Get ready for DEFCON-1!