Scientists of astronomers are constantly studying the Earth satellite - the moon and recently they discovered strange movements on the surface of the celestial body. Looking from a stronger telescope, the observers saw that the stars are moving from the Moon to the Earth with the aliens. Earthlings it's time to get ready for the meeting and it will not be solemn and pleasant. Your cozy house is also in danger, take a heavier weapon, you can start with a bit, and fight off the aliens that are falling from above. Swing a stick and peel at the uninvited guest, gaining victory points and opening access to new, more effective weapons. Soon in Alien go home just a bat can not do.