So in this game, you have to hold the space base from the attack of Aliens who want to take over the American space base, your job here is to shoot down all enemy aircraft and not let him in, the beginning of the American space base was attacked, because, American scientists were researching an object in space, and it turned out that it provoked the arrival of aliens, and yes… America’s space base is in danger, so, what are you waiting for? save it now by playing it.