They came from space when no one was looking. No one except you. While all of the Earth's military were wiped out in a sneak attack you managed to scramble into the last tank and got ready to deal the alien scum some payback. Your goal is to kick those interstellar punks all the way back to Uranus and beyond. You need to make your shots count and use your power ups to maximum effect and pick up the ammo they drop. Try and bag more than one of these critters at a time to get multi-kills and more points. Use "A" and "D" KEYS to move your tank. Use YOUR MOUSE to aim and use NUMBER KEYS to activate upgrades. Good luck.