UFO防御是您可以免费在Ugamezone.com上播放的拍摄游戏之一。射击敌人并清除老板以完成每一个任务。从入侵者捍卫地球！享受！
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:
