Galaga is a single-screen shoot-em-up in which the player controls a “fighter” spaceship and must defend the home planet against the on-coming hordes of alien invaders. The fighter can only move left and right along the bottom of the screen. Galaga aliens fly onto the screen in a variety of formations – dropping bombs as they do so – before forming troop lines at the top of the screen. Once a troop line is formed, the aliens separate and start attacking the player’s ship in ones, twos and threes. The top line “boss” aliens need to be shot twice before they are destroyed. The boss alien has a tractor beam that can capture the player’s fighter. A captured fighter changes color from white to red and stays with that particular boss Galaga until it’s destroyed. The fighter can be retrieved by destroying the boss Galaga that captured it, but players must be careful not to destroy the captured ship itself, or that ship is lost. A rescued fighter changes color back from red to white and links up with the player’s current fighter, doubling its fire power. As players progress through each screen, the speed and number of alien attacks increases. Alien formations also become more complex, making the aliens harder to shoot. Bonus fighters are awarded periodically throughout the game, as players reach specific point values (dictated by the “bonus life” dip-switch setting). Each enemy ship also has an assigned point value (see scoring below). The alien troop lines that form at the top of the screen are, from top to bottom: Boss Galaga, Butterflies (red/white bug ships) and Bees (blue/yellow bug ships). I cut my teeth on video games like this back in the ’80s. Pinball lost momentum in this era as video games ruled the arcade at this time.