What is the Konami Code?
The “Konami Code” (or sometimes called the “Contra Code”) refers to a certain sequenced cheat code ( “Up, Up, Down, Down, Left, Right, Left, Right, B, A, Start”) that Konami infamously reused in many of its NES/FC games. By punching in the code at the right time, it allowed for extra lives or power-ups, or some kind of bonus, which was welcomed by many gamers stuck on tough challenges in Gradius or Contra especially.