If you've dreamed of holding the fate of the universe in your hands, you'll want to play a free Alien Attack game online! You'll defend the galaxy from the alien onslaught by maneuvering your spaceship and destroying the invading creatures. Eliminate the invaders as fast as possible, using the left and right arrow keys to maneuver and the spacebar to fire as rapidly as you can. But don't worry - if you fail, you can always hit the reset button!