“In the spring of 1978, Taito approached Midway about distributing a new arcade game in the United States. The game had originally been invented as a hexadecimal test used for evaluating computer programmers. Someone decided to convert the test into a video game that Taito distributed in Japan, despite the unenthusiastic blessing of company executives. The game was called Space Invaders.”
Kent, Steven L. The Ultimate History of Video Games, New York: Three Rivers Press, 2001, p. 116
The Rise and Fall of Space Invaders in the British Press
