In the distant future, on the planet Mars, earthlings organized a colony in which the miners lived mining various minerals. You in the game Not One will command the defense of the settlement. One morning, aliens who came from outer space attacked your colony. You will have to fight back. Before you on the screen will be visible rocket launcher, which you will control. An alien will appear in the sky, which will gradually fall to the ground. You will have to guess the moment and firing a rocket to bring down the enemy. Destroying it you will get points for it.