Space Invaders is a 1978 shoot ’em up arcade video game developed and published by Taito. It was released in Japan in April 1978, with the game being released by Midway Manufacturing overseas. Commonly considered to be one of the most influential video games of all time, Space Invaders was the first fixed shooter and the first video game with endless gameplay (meaning there was no final level or endscreen) and set the template for the genre. The goal is to defeat wave after wave of descending aliens with a horizontally moving laser cannon to earn as many points as possible.

Designer Tomohiro Nishikado drew inspiration from North American target shooting games like Breakout (1976) and Gun Fight (1975), as well as science fiction narratives such as the novel The War of the Worlds (1897), the anime Space Battleship Yamato (1974), and the film Star Wars (1977). To complete development, he had to design custom hardware and development tools. Upon release, Space Invaders was an immediate commercial success; by 1982, it had grossed $3.8 billion ($14 billion in 2023-adjusted terms), with a net profit of $450 million ($1.7 billion in 2023 terms). This made it the best-selling video game and highest-grossing entertainment product at the time, and the highest-grossing video game of all time.

Space Invaders is a fixed shooter in which the player moves a laser cannon horizontally across the bottom of the screen and fires at aliens overhead. The aliens begin as five rows of eleven that move left and right as a group, shifting downward (advancing on the shooter) each time they reach a screen edge. The goal is to eliminate all of the aliens by shooting them. While the player has three lives, the game ends immediately if the invaders reach the bottom of the screen. The aliens attempt to destroy the player’s cannon by firing projectiles. The laser cannon is partially protected by stationary defense bunkers which are gradually destroyed from the top by the aliens and, if the player fires when beneath one, the bottom gets destroyed.

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