Arkham Knightmares Season One Episode Three: Doors Out of Time

After receiving a mystical blade from a strange cloaked woman, Chauncey has been tasked with seeking out and opening portals, or "doorways" in the Arkham Manor. However, this task will not be as easy as it appears. When asking the witch why he was attacked by a deranged faceless man, she informed him that the manor was filled with "Pretenders", and that he wouldn't find any help forthcoming... Worse yet, the demonic clown known as Darko may still have Chauncey in his sights. And it's questionable if his newly acquired weapons can help stave off the creature's unknowable machinations.