This is the famous Konami code that has wormed its way into popular culture. It gives the player a full set of powerups. When entered backwards, it gives the player 30 lives.
↑ ↑ ↓ ↓ ← → ← → B A
This code will also work with the NES game Contra. It will give the player 30 lives.
- The statement above is not completely correct***
The original "Contra" or "Konami" code for 30 lives works for Contra and Gradius 2 (Life Force) - but not the original Gradius for the NES. The code WILL work on Gradius to give most upgrades after the game is paused.
Using the code backwards does not work for Gradius either. However, it reportedly works for the game Gyruss to give 30 lives. The similar names I belive lead to the confusion - correction by Underjunk.