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After entering the sequence using the controller when the game was paused the player received all available power-ups.

Finding the game too difficult to play through during testing, he created a cheat code to give the player a full set of power-ups (normally attained gradually throughout the game). 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 first used in the 1986 release of Gradius, a scrolling shooter for the NES and was popularized among North American players in the NES version of Contra, for which it was also dubbed both the "Contra Code" and "30 Lives Code", because of its near necessity in-game.