Classic Arcade Games: Space Invaders

Space Invaders is a two-dimensional, fixed shooter game in which the player controls a laser cannon by moving it horizontally across the bottom of the screen and firing at aliens. The aim is to defeat five rows of eleven aliens—some versions feature different numbers—that move horizontally back and forth across the screen as they descend towards the bottom of the screen. The player defeats an alien, and earns points, by shooting it with the laser cannon. As more aliens are defeated, the aliens’ movement and the game’s heartbeat sound both speed up. Defeating the aliens brings another wave that is more difficult; a cycle which can continue indefinitely.


