Game description: Earth has been invaded by evil aliens. Commander of the Earth's Security Department convened an emergency commandos to rescue the galaxy. Well, this is the earth in the end the nightmare of nightmares, or aliens do? Or please gamers to bar announced. Break through all obstacles, and allow all players to reach the exit, you can cross the boundary. Operators guide: keys / WSAD keys to move the jumping and squatting / . Z / N key attacks / , X / M key to use special skills / . C / V key to switch the role of / . 1,2,3 key role in fast switching , ESC key to suspend the , the space bar the next level .