Martin "Mad Dog" Hawkins was a serial killer-turned-patient of Arkham Asylum during the institute's opening years.
While not appearing visually in the game, Martin Hawkins was discribed via the Chronicles of Arkham and present via an etching on a plaque before a vandalized statue of Amadeus' wife, Constance Arkham.
From an early age, Martin Hawkins was beaten and sexually abused by his father. Hawkins grew up to become a disturbed man who cut himself in order to feel something. One day, as he was driven further into insanity, Hawkins claimed to see visions of the Virgin Mary, who told him to go out and kill women, by destroying their faces and sexual organs in order to "stop the dirty sluts from spreading their disease."
When Amadeus went back to Gotham City and set up Arkham Asylum, he went back home to find that Hawkins had broken into his house and brutally murdered his wife and daughter.
Hawkins was captured again and sentenced to Arkham Asylum, where he underwent intense treatment under orders from Amadeus. Eventually, despite what he had robbed the man of. Hawkins managed to slowly win back Amadeus' confidence that he could be cured. Unfortunately, as soon as he was released, he used Arkham's pen to kill his secretary. Amadeus, through with giving Martin chances, had him permanently institutionalised, despite the latter's begging for mercy.
On the anniversary of his family's murder, Amadeus strapped Hawkins to a shock therapy table and fatally electrocuted him, and got revenge for the deaths of his wife and daughter. Hawkins' death was treated as an accident while Amadeus himself was admitted into his own asylum.
- Martin Hawkins first appeared in Arkham Asylum: A Serious House on Serious Earth (October 1989).
- The decapitation of the statue of Constance Arkham could be a reference to how Hawkins decapitated Arkham's daughter and stuffed her head into a doll house in the comic Arkham Asylum: A Serious House on Serious Earth, it's also said that he raped her in the comic. However, in the Arkham series, there is no indication that Hawkins did anything more than murdering Amadeus' family, which leans towards the belief that Martin never did anything more than that.