Human v Alien

The evil alliens corrupt the world and want to kill all humans on earth. Mankind on the edge of existence. You're one of the rebel. You have your gun and power to fight with aliens. Shoot them all. Use all great arsenal to kill all aliens. Save the whole Earth from invaders and complete the game. Arrow keys to move, A to shoot, S to jump, Space bar to enter the door, R to reload, P to pause.