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The defense game with over 11 million downloads is back with more advanced graphics and systems! - Kill or be killed! It’s one or the other! It's the breathtaking confrontation for mankind's survival! - Stay frosty! The tension never lets up as you move to the second half of the stage! Feel the intensity! - Join the S.W.A.T. team and kill all the zombies. You must protect Perfectville, the last remaining safe zone.