On one of the planets on the outskirts of our Galaxy, earthlings created a colony. Here live the miners who mine various minerals. But the trouble on the planet were monsters who began to attack the settlement. A barrier wall was erected around the city and a lot of guns were installed. You in the game Nova Defender will command the defense of the settlement and repel the attacks of various kinds of monsters. You will see them moving towards the wall. Clicking on a monster you will designate it as a target and your soldiers and defense towers will fire and destroy it.