Historically, cheat codes were intentional inclusions by developers to facilitate playtesting. For example, programmers might use a specific button sequence to grant invincibility or bypass difficult levels during quality assurance. Iconic sequences like the Konami Code ( ) transitioned from testing tools to cultural staples.

One of the most interesting "taboo" features unlocked by a verified cheat code is the "Ruin the Fun" command in Cookie Clicker Feature: "Ruin the Fun" (Game.RuinTheFun(1);)