| http://www.w3.org/ns/prov#value | - Each city has a unique view, and the game will offer you endless fun!- 9 different types of turrets, including the gatling gun, the tesla coil, the air-defense guns, and the shockwave generator.- A wide variety of zombies, including human zombie, dog zombie, bomb zombie and even titan zombie.- 2 defense modes and 3 difficulty levels.- 3 special skills: the Space Laser, the Shockwave Bomb and the B
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