File:Montreal Comiccon 2015 - Black Mask (19462840011).jpg - Simple English Wikipedia, the free encyclopedia
Batman: Arkham Origins Blackgate Guide - IGN
Batman Arkham Origins Guide - IGN
Batman: Arkham Origins - Wikipedia
Black Mask, Arkham Wiki
Richard Sionis, Batman Wiki
Black Mask
Roman Sionis, DC and Marvel Wiki
Batman: Arkham City - Wikipedia
Batman: Arkham Origins Blackgate Guide - IGN
Roman Sionis/Black Mask, The Arkham Universe Wiki
Batman Arkham Origins Guide - IGN
Arkham Asylum - Wikipedia
Batman Arkham Origins Guide - IGN
The batman Arkham wiki was not lying when it said that Jokers design in Arkham knight looked quite different to his appearance in Arkham asylum, then again that was back in 2009