Retro Aliens Attack is a Space Invaders based game. You have to defend Earth from the evil aliens that are trying to invade. Use your moving cannon to blast them out of the sky. Shoot all the aliens before they reach the bottom or it will be game over and you will have to start again. The Aliens also shoot at you and you start with three lives if you are hit this will take a life off you.
Use Left and Right Arrow keys to move your cannon.
Use Space Bar to fire the cannon.