On one unique planet, there are very important resources that any civilization would like to possess. But you first managed to build a base here and start mining resources. But not everything is as calm as it seemed, on the base is completely attacked by the inhabitants of the planet. These monstrous monsters, which move only waves of several dozen. Your task is to organize the defense of the base. To do this, use guns that will destroy the enemy. Set them in different places, think through each step before the first wave begins. If you do everything correctly, then no enemy will fail. Do not forget to perfect your weapons, to fight more powerful enemies.