: You will hear a sound of fluttering bats if entered correctly. Batman Arkham City costume unlock code
Apart from technical activation, "Unlock Codes" can also refer to a built-in cheat code that allows players to use any downloaded without completing the story first. Steam Community How to use the Skin Unlock Code: Navigate to the (after selecting your save slot). Quickly enter the following sequence: Keyboard/D-Pad: Left, Left, Down, Down, Left, Left, Right, Up, Up, Down. Batman Arkham City Serial Key And Unlock Code