Most popular cheat code
Gradius (Konami, 1985)
The cheat code that has been featured in the most videogames in history is the Konami Code, which debuted in the NES version of Gradius, released in 1986, and has been included in 151 games to date. The effect of the code varies from game to game, but in most cases entering the code while the game is paused grants the player most of the game’s available power-ups. The same button presses or subtle variations thereof have always been used. For those players who never encountered it, or have simply forgotten about it, the sequence is, of course, Up, Up, Down, Down, Left, Right, Left, Right, B, A. Featured in Guinness World Records Gamer''s Edition 2010