Spacewar! on a DEC Type 30 display connected to a PDP-1
Spacewar! is a
space combat video game developed in 1962 by
Steve Russell in collaboration with Martin Graetz, Wayne Wiitanen,
Bob Saunders, Steve Piner, and others. It was written for the newly installed
DEC PDP-1 minicomputer at the
Massachusetts Institute of Technology. It was later expanded by other students and employees of universities in the area, including by Dan Edwards and
Peter Samson. It also spread to many of the few dozen installations of PDP-1s, making it the first video game to be played at multiple computer installations.
The game features two
spaceships, "the needle" and "the wedge", engaged in a
dogfight while maneuvering in the
gravity well of a star. Both ships are controlled by human players. Each ship has limited ammunition and fuel for maneuvering, and the ships remain in motion even when the player is not accelerating. Flying near the star to provide a
gravity assist is a common tactic. Ships are destroyed when they collide with a torpedo, the star, or each other. At any time, the player can engage a
hyperspace feature to jump to a new and random location on the screen, though in some versions each use has an increasing chance of destroying the ship instead. The game was initially controlled with
console switches on the PDP-1, though Bob Saunders soon built an early
gamepad to make it easier to play.
Spacewar! is one of the most important and influential games in the
early history of video games. It was extremely popular in the small programming community in the 1960s and the
public domain code was widely
ported to and recreated on other computer systems at the time, especially after computer systems with monitors became more widespread towards the end of the decade. It has also been recreated in more modern programming languages for PDP-1
emulators. It directly inspired many other video games, such as the first commercial
arcade video games,
Galaxy Game and
Computer Space (both from 1971), and later games such as
Asteroids (1979). In 2007,
Spacewar! was named to a list of the ten most important video games in history, which formed the start of the
game canon at the
Library of Congress, and in 2018 it was inducted into the
World Video Game Hall of Fame by
The Strong and the
International Center for the History of Electronic Games. (
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