Humans like to think that they are the dominant species on Earth, but in the future this is not the case any more. Monsters far more powerful have arrived and have taken over. You play on the side of monsters and there are four to choose from. Your job is to prove to be the most dominant monster around but there are other monsters as well as humans and their military firepower trying to stop you. You'll have to call on all of your power and even your special techniques to pull through and be victorious.