Games of Aliens

Games Aliens: everything that mankind had feared is here, the Aliens have arrived and want to take control of the entire planet Earth, thank goodness you're you to avoid it at all costs. Each of these sets of rules and Aliens have different objectives, but to all of them is the same, kill all the aliens who want to exterminate the entire human race regardless. Sure you find a way to avoid this disaster, not by putting pressure, but the future of the human race depends only on you.