Possibly the world's most famous video game cheat code, the Konami Code was used in many early Konami video games such as Contra, Gradius, and Teenage Mutant Ninja Turtles 2, among others. Can you remember how it goes?
For the D-pad, type the directions you press (i.e. up, down, right, left)
Does not include pressing the Start button to begin the game.