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Use the mouse to aim and shoot the alien.
Play Xeno Defense game online for free at school against lots of enemy coming from outer space, collect the highest score and a large number of valuable resources as soon as possible! Your mission is to keep these evil aliens from approaching your defenses and damaging them. In the Xeno Defense, you are able to switch and choose the weapon that you'd like. You have only some days to wipe out every wave. Try your best to survive, complete the job and become the winner!