You have get the most important mission and it is to protec the Earth. However, enemies are not here on the ground but in the space. You have been asked to protect the Earth as such, and your enemies are not just some people. You fight against nature, or rather the universe. There are thousands of planets, asteroids, and other galactic particles flying directly on Earth that means death. The universe has fallen into the chaos and is no longer as we know it. Shoot objects flying to Earth and keep humans hope for as long as possible. Collect lives, shields and enhancements. Survive as long as possible. Have fun.