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Substitute During World War III, the United States was creating a powerful biological bomb that resulted in the mutation of a lot of creatures. Protect your city against these baddies in this addictive tower (turret) defense game.


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<iframe name="game" id="game" src="http://www.gamexcite.com/getGame.php?gameID=4431" border="0" frameSpacing="0" scrolling="0" framepadding="0" frameBorder="0" width="600" height="400"></iframe>



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