This is your chance to launch a pre-emptive strike on the human race. Enough Weapons of Mass Destruction have been found on the Earth to destroy dozens of planets! Obliterate the tyrannical human empire before they destroy the peace and freedom of the whole galaxy!

Tips:

• Press "controls" in-game for gameplay instructions.
• Homing rockets move faster than they accelerate - change directions quickly to avoid them, or to get them to slam into the ground (Which can kill enemies, too)
• Rockets can be shot down but it's often not easy.
• Rockets detonate harmlessly when they run out of fuel, which take 4 seconds.
• Use the tilt of your ship to your advantage when firing lasers.
• Watch that laser cannon charge!
• You don't have to kill everything in the level to win - just survive to the end! (Except mission 2 where the mothership must also survive).