Our galactic society has a big big problem. For hundreds of years a dark force is brooding evil unto us. Our planets of peaceful tax paying galactic citizens are overrun by pests: creepy monsters, weird aliens, evil nuns, freaky crocodiles, smelly zombies, ungodly robots, fallen angels, risen demons and other creatures we dare not name here. Your heroic job is to go and kill these pests and free the planets. Source: The Game Website.