A friend code is a code that you are given upon starting the game. It is composed of 6 letters (ranging from A to F alphabetically), or 6 numbers (1 to 9), or some combination of both. You use your friend code to add players as allies in game for free instead of paying with in game cash to add allies. You find your code on the allies page in game. Your code is unique from anyone else's, so then people can add you and only you. Note: Ally codes do not contain the letter "o". If you see a character similar to the letter "o", it is in fact the number zero - "0".