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FREE Alien Invasion Game is a shooter game where you shoot the aliens that pop up from behind the buildings in the city skyline. The free alien invasion game is fun to play try to get hero status. To play free alien invasion game just double click on the game to start. To shoot down the aliens click on them with your mouse. If you need to pause the free alien invasion game press the "p" key, then again to resume. Try to get the highest accuracy percentage that you can, The highest rank is you can be awarded is Hero. The free alien invasion game is an excellent shooting game to play when you are bored. Enjoy the free alien invasion game whenever you like in The PCman's fun, flash games arcade.