Waylon Jones, better known as Killer Croc, is an antagonist in Batman: Arkham Asylum. He is a boss and minor antagonist in Batman: Arkham Origins and makes a cameo in Batman: Arkham City. He appears in the Season of Infamy DLC of Batman: Arkham Knight. Due to a genetic disorder, he was born with crocodile-like skin, a condition that grew worse over the years. Forced to live with his abusive and alcoholic aunt and abused and bullied his entire life due to his appearance, Croc grew to despise humanity, becoming more and more animal like, in body as well as in spirit.