Talk:SAS: Zombie Assault 4/@comment-212.76.86.35-20150204200513/@comment-25739940-20150204213500

On PC I think you'll need an NK account and have to log in with it, then it'll be whatever you NK account is.

On mobile there's a cloud icon on the Character Select screen; tapping it will bring up a display name field you can enter whatever in to.