Enter code exactly as seen in "Excusive Content" in main menu. 735S653J If entered correctly then In-game quote follows: "Exclusive Content New content has been unlocked: Extra money for equipment in single player has been added! Extra money for characters unlock in multiplayer has been added! Your weapons in multiplayer will become silver from now on! You have gained an exclusive weapon to be used in the first two chapters!" Confirmed working on both PC and XBOX360.