Spacewar!
1962 · Space Combat · DEC PDP-1
Overview
Spacewar! is one of the most influential early computer games, developed in 1962 by students at MIT on a DEC PDP-1 mainframe. Two players pilot spaceships — the needle and the wedge — around a central star with realistic gravitational pull, firing torpedoes at each other. The game spread rapidly among research institutions and universities as PDP-1 computers were shared and the code freely copied. It is widely regarded as the first widely-played and widely-influential computer game, directly inspiring an entire generation of developers and game designers.
Deep Dive
Spacewar! was created by Steve Russell and his colleagues at MIT's Tech Model Railroad Club. The game featured a realistic starfield background, gravity simulation from a central star that could slingshot ships if used cleverly, and the option to enter hyperspace — a risky random teleport used as a last resort. The MIT hackers kept adding features: Dan Edwards added the gravity star, and Peter Samson contributed an accurate star map of the night sky. By the mid-1960s, Spacewar! was installed on nearly every PDP-1 computer in the United States. In 1972, Nolan Bushnell directly credited it as inspiration for the first commercial arcade game, Computer Space. It is regularly cited as one of the ten most important computer programs ever written.
Developer Story
Spacewar! emerged from the collaborative hacker culture of MIT's Tech Model Railroad Club in 1962. Steve Russell wrote the core game engine, but it was truly a team effort: Martin Graetz and Wayne Wiitanen conceived the concept, Dan Edwards added the gravitational star, and Peter Samson contributed a real star map of the night sky. The group shared code freely, seeing software as something to be given away and improved collectively — a philosophy that predated the open-source movement by decades.
Did You Know?
- The background starfield in Spacewar! was an accurate map of the night sky as seen from Cambridge, Massachusetts, programmed by Peter Samson and nicknamed "Expensive Planetarium."
- Nolan Bushnell played Spacewar! on a PDP-1 at the University of Utah and directly credited it as the inspiration for Computer Space, the first commercial arcade game.
- By the mid-1960s, Spacewar! was installed on nearly every PDP-1 in the United States — it spread via magnetic tape passed between research institutions.
- The hyperspace feature was added as a desperation move — pressing it teleported your ship to a random location, which could save you or put you inside the star.
- Rolling Stone magazine ran a famous 1972 article by Stewart Brand about Spacewar!, one of the first mainstream pieces of journalism about video games.
