On This Day - 18th October

1973

Tennis for Two is demonstrated

One of the earliest electronic video games, Tennis for Two, is demonstrated at Brookhaven National Laboratory in New York.

Created by physicist William Higinbotham, the game was designed to make the laboratory's annual Visitors' Day more entertaining. It simulated a game of tennis on the screen of an oscilloscope, with a moving dot representing the ball and a horizontal line representing the net.

Two players controlled the game using separate hand controllers, each equipped with a button and a rotating dial that determined the angle at which the ball was hit.

The system used a Donner Model 30 analogue computer to calculate the movement of the ball, while the oscilloscope provided the graphical display. The game even simulated different gravitational conditions; a later version allowed players to select the Moon or Jupiter.

Hundreds of visitors queued to play the game during the exhibition. Although Tennis for Two was never commercially released and existed only as a scientific demonstration, it became an important milestone in the development of electronic games and the video-game industry.

Earlier electronic game-like inventions existed, so Tennis for Two is more accurately described as one of the earliest video games rather than definitively the first.
Source: Brookhaven National Laboratory; Computer History Museum.
Tennis for Two was first publicly demonstrated on 18 October 1958 at Brookhaven National Laboratory's Visitors' Day. The original game was dismantled after its period of use and its components were reused.

Also in this month

Other historical information recorded for October.

Spectrum sales top 500,000
1983

Spectrum sales top 500,000

Sinclair Research announced that sales of the ZX Spectrum had passed half a million machines. The figure covered mail-order and retail sales between April 1982 and August 1983. Sinclair said the Spectrum had sold faster than the ZX81 over comparable periods and promised continued support through new peripherals, including the recently launched ZX Interface 1 and Microdrives.
Source: Sinclair User October 1983
Sinclair User Issue 19 reported that Sinclair Spectrum sales had exceeded 500,000. The figures covered sales from April 1982 to August 1983 and included both mail-order and retail sales. The article compared this with 400,000 ZX81s sold between March 1981 and July 1982. It also mentioned the August launch of the ZX Interface 1 and Microdrive, with a joystick and cartridge interface planned for later in the year.
Deus Ex Machina Released
1984

Deus Ex Machina Released

Automata released Deus Ex Machina, an ambitious multimedia work created by Mel Croucher and programmed for the ZX Spectrum by Andrew Stagg. Designed as an experience combining computer graphics, narration, music and a separate synchronised audio soundtrack, the 48K Spectrum program follows a lifeform through creation, birth, development, adulthood and death. The soundtrack featured contributions from performers including Ian Dury, Jon Pertwee, Frankie Howerd, Donna Bailey and E. P. Thompson. Croucher later described Deus Ex Machina as “the best game you never played”, a phrase subsequently used as the title of his book about the project and its creation.
Source: Sinclair User, November 1984; Your Spectrum, December 1984; Mel Croucher interview; Deus Ex Machina: The Best Game You Never Played in Your Life
Contemporary Sinclair User and Your Spectrum material documents Automata's Deus Ex Machina as a highly unusual 48K Spectrum production combining a computer program with a separate synchronised audio soundtrack. The work was created by Mel Croucher and programmed by Andrew Stagg, with contributions from Ian Dury, Jon Pertwee, Frankie Howerd, Donna Bailey and E. P. Thompson. In later interviews and his book about the project, Croucher reflected on Deus Ex Machina and described it as “the best game you never played”. The commonly cited release period is October 1984, although an exact day has not yet been established from contemporary evidence.
Page Revised: 07/09/2026