Space Invaders - Play Online, Ruffle, Unblocked

Space Invaders is a 1978 shoot 'em up video game developed and published by Taito for arcades. It was released in Japan in April 1978, with the game being released by Midway Manufacturing overseas. 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 considered one of the most influential and greatest video games of all time, having ushered in the golden age of arcade video games. It was the inspiration for numerous video games and game designers across different genres, and has been ported and re-released in various forms. The 1980 Atari VCS version quadrupled sales of the Atari VCS, thereby becoming the first killer app for video game consoles. More broadly, the pixelated enemy alien has become a pop culture icon, often representing video games as a whole.

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.

As aliens are defeated, their movement and the music both speed up. Defeating all the aliens brings another wave which starts lower, a loop which can continue endlessly. A special "mystery ship" will occasionally move across the top of the screen and award bonus points if destroyed.

Space Invaders was developed by Japanese designer Tomohiro Nishikado, who spent a year designing it and developing the necessary hardware to produce it. The game was a response to Atari's arcade game Breakout (1976). Nishikado wanted to adapt the same sense of achievement and tension from destroying targets one at a time, combining it with elements of target shooting games. The game uses a similar layout to that of Breakout but with different game mechanics; rather than bounce a ball to attack static objects, players are given the ability to fire projectiles at moving enemies.

Nishikado added several interactive elements that he found lacking in earlier video games, such as the ability for enemies to react to the player's movement and fire back, and a game over triggered by the enemies killing the player (either by getting hit or enemies reaching the bottom of the screen) rather than simply a timer running out. He replaced the timer, typical of arcade games at the time, with descending aliens who effectively served a similar function, where the closer they came, the less time the player had left.

Early enemy designs included tanks, combat planes, and battleships. Nishikado, however, was not satisfied with the enemy movements; technical limitations made it difficult to simulate flying. Humans would have been easier to simulate, but the designer considered shooting them immoral. After seeing the release of the 1974 anime Space Battleship Yamato in Japan, and seeing a magazine feature about Star Wars (1977), he thought of using a space theme. Nishikado drew inspiration for the aliens from a novel by H. G. Wells, The War of the Worlds, and created initial bitmap images after the octopus-like aliens. Other alien designs were modeled after squids and crabs. The game was originally titled Space Monsters after a popular song in Japan at the time, "Monster", but was changed to Space Invaders by the designer's superiors.