Earth is under attack by a deadly alien force, and you are one of the last remaining starship pilots to defend it. Take to Earth's orbit to beat back the alien force and destroy their capital ship! -Choose from a suite of different armaments for your ship, such as the powerful bombing system, or the rapid fire laser system, to help you combat your enemies. -Collect scrap from destroyed enemy ships and successful missions to upgrade your capital ship's capabilities and features. -Keep an eye out for powerful boosters hidden in asteroids to give you the edge in combat. -Allocate your defense force with fighter, bomber, and defender ships to help you cover the battlefield.-Destroying all the marked 'weak points' on a capital ship will bring victory to you and your forces.You are Earth's last line of defense. Can you save your world?