Konami Corporation

Konami has a secret code which is used in a lot of games. The famous code combination is Up-Up-Down-Down-Left-Right-Left-Right-B-A. Results vary per game. SNES often used L and R instead of B and A, and on the PlayStation they were replaced by the Square/Triangle/Cross/Circle buttons.

There's even a Californian rock band called Up-Up-Down-Down-Left-Right-Left-Right-B-A and the punk band The Ataris named a song after the code on the album "End Is Forever".

Contributed by Sciere.