It is your job to save the planet from its decay. Only you can prevent the extraterrestrial species from taking over all of humankind. How? By shooting them back to where they belong - into the depths of hell of course!
- A normal play mode with a final, great enemy to defeat!
-Unlock "Hard mode" where endless waves of enemies await you!
-Random spawning enemies in hard mode!
-Local coop mode with 3 classes for your partner!
-Random encounters with mini bosses in hard mode!
-Top your highscore!