Earth Under Siege

Mankind is threatened! All major cities and countries were destroyed by bloodthirsty, powerful aliens. All nations must put aside their differences in a last effort for survival. 8 state-of-the-art hatches are built in key territories of the planet, equipped with the most destructive technologies ever developed. 8 types of cannons under only one command, in a desperate attempt at retaliation. What lies ahead is the most fantastic and deadly war the world has ever seen. Source: The Game Website.