It is the year 2150, and three planets are about to crash together and destroy all three planets at once. The only other option is for two of the planets to be destroyed in order to save one of them. There are three alien planets and all are fighting to be the one planet to survive. Choose your race, and fight for your people to try and destroy the other two. Buy units, and place them on the planet and click to shot and protect your base while trying to destroy the alien mother ship on each planet. Buy new units and turrets in order to save your race, and doom the others.