A vicious alien menace has its sights set on planet Earth, and you're going to have to travel the solar system to stop it. You'll get your choice of three different ships (each has variable weaponry and speed), and six different battlefields on which to take care of business. You'll face tiny spacecraft, huge bombers, giant robots, and deadly bosses in two different modes. Hidden levels add to the fun factor and replay value in a big way. Of course, you don't have to save the planet...but it's not a bad way to make friends.