Tower Defense: Infinite War

In the far future, people build a base on a strange planet they don't know about to protect their limited resources. Aliens from the planet are constantly attacking your base, and you have to protect it by making defenses against them. Your mission is to deal with different enemies by figuring out their weak spots and good ways to defend yourself. You won't be able to beat enemies that are getting stronger, faster, and more numerous if you don't.