Fortunately for you, jackfrags goes step by step on how to unlock this mysterious Easter Egg. Keep in mind that the final code is unique to each and every person! That means if you want the final prize, you will have to go through all of the steps outlined below. Well, at the very least you can probably skip over having to shove your head inside of a rock.
And what do you get after all is said and done? You get the DICE LA camo. This camo was previously exclusive to only DICE employees and is certainly one of the more unique camos in the game.