塔防外星人战争是一种塔防游戏，您可以在UGameZone.com上免费玩。外星人战争是一款带有防御概念的激动人心的游戏。您必须用可升级的枪支和制导导弹保护城堡，以防止外星人入侵。在每个阶段，您都应该消灭入侵者并获得尽可能多的金币。
Enable Flash in Chrome settings. When Flash is disabled, the label will read " Block sites from running Flash ".Click the toggle to enable flash and the label will read " Ask First ". Shown like the following:
Now Click And then,click " Allow " in the box that appears in the top-left to play the game.Shown like the following:
