Konami Code

[2] The code has also found a place in popular culture as a reference to the third generation of video game consoles,[3] and is present as an Easter egg on a number of websites.

[10][12] The Konami Code was created by Kazuhisa Hashimoto, who was developing the home port of the 1985 arcade game Gradius for the NES.

The code was meant to be removed prior to publishing, but this was overlooked and only discovered as the game was being prepared for mass production.

The sequence was easy enough to remember for testers and simultaneously sufficiently hard to enter accidentally during the gameplay for unsuspecting users.

[citation needed] The Konami Code was thus included in the series' other sequels and spin-offs, with some key differences.