Space Invaders

Space Invaders is an arcade video game originally released in 1978 by Taito. The aim of the game was to defeat five rows of eleven aliens before they reached the bottom of the screen. The player controlled a cannon at the bottom of the screen that could move horizontally and shoot lazer beams straight up which could destroy a single alien. The aliens could shoot downwards, and three shields were placed at fixed locations above the cannon to hide behind. These shields were slowly destroyed by the aliens shots until the cannon had no place to hide and had to dodge the shots.