The 28 hidden characters in Batman: Arkham Asylum

Tweedledum and Tweedledee

First comic appearance: Detective Comics #74 (April 1943)

Arkham Asylum appearance: Arkham North (Entrance Gate)

The connection: Two more characters who steal their persona from nursery rhymes and Lewis Carroll books… what are the odds? Pretty high in Gotham City, we suspect. While the pair are not considered particularly insane, they do appear in the aforementioned Arkham Asylum: A Serious House on Serious Earth. In that graphic novel, they are connected by a couple of electroshock helmets, with one as the left half of the brain and the other as the right half.

So are the beanies sitting on this seesaw equally complicated? Or are they simple, silly costume hats? We may never find out.

Bizarro Fun Fact: In the comics, the original Tweedledum has died and been replaced by his twin brother. Both are cousins to Tweedledee.

Black Mask

First comic appearance: Batman #386 (August 1985)

Arkham Asylum appearance: Arkham Mansion (Dr. Young’s Office); Medical Facility (Patient Observation)

The connection: Roman Sionis’s parents were obsessed with appearances. They covered up the fact that Roman was dropped on his head as a baby because they feared the social repercussions. They hated Bruce Wayne’s parents, but remained friends with them because it looked good to do so. Because his family always wore metaphorical “masks” in public, Roman chose that theme when he was driven to become a villain. His trademark mask, found in Dr. Young’s office, is carved from the coffin of his dead mother… who he murdered, along with his father. Yuck.

There’s another reference to Black Mask in the newspaper clippings that mention Firefly and the Injustice Gang. “Roman Sionis in court!” screams the headline. This probably refers to the incident in which his cosmetics company rushed a product to shelves and ended up disfiguring hundreds of women.

Bizarro Fun Fact: Black Mask was killed by Catwoman. Not once, but twice.


First comic appearance: Batman #609 (January 2003)

Arkham Asylum appearance: Medical Facility (Surgery Room)

The connection: Hush’s true identity is Tommy Elliot, a childhood friend of Bruce Wayne’s. Like Bruce, he had a wealthy upbringing and traveled the world after his parents’ untimely death. Unlike Bruce, he was the one who killed his parents. When he returns to Gotham City, he works as a famously skilled surgeon before letting an irrational jealousy and hatred of Bruce consume him.

Based on this white board, Tommy Elliot has not yet been revealed as Hush in the Arkham Asylum universe. The alter ego may not even exist yet… but could emerge for a sequel.

Bizarro Fun Fact: As an adult doctor, Thomas Elliot treated a patient named Edward Nigma (aka the Riddler). As a boy patient, Thomas Elliot was treated by Dr. Jonathan Crane (aka the Scarecrow).

Killer Moth

First comic appearance: Batman #63 (March 1951)

Arkham Asylum appearance: Botanical Gardens (Aviary)

The connection: Would you be surprised if we told you that a low-rent villain called Killer Moth carried a cocoon gun? Of course not. Based on the morbid scene above, however, Arkham Asylum might be going for a darker take on the character. The cocoon gun is supposed to trap victims only – there shouldn’t be a skeleton unless he left his prey to starve up there.

So he’s either seriously sadistic… or he’s Charaxes, a monster that Killer Moth transformed into upon selling his soul to a demon. Yes, this actually happened in a 1995-1996 miniseries. Charaxes secretes an acid that can dissolve human flesh.

Bizarro Fun Fact: Killer Moth really envies Batman’s style. He built himself a Mothcave, drives a Mothmobile and occasionally uses a Moth-signal.

Calendar Man

First comic appearance: Detective Comics #259 (September 1958)

Arkham Asylum appearance: Penitentiary (Main Cell Block)

The connection: Batman villains love their themes, but this guy is ridiculous. His alter ego is Julian Gregory Day, a three-word name that manages to cram in three references to calendars. If you haven’t guessed his modus operandi yet, you’re not even trying. He plans crimes so that they relate to the day on which they are committed. In his Arkham Asylum cell, you can find torn pages for January 1st (New Year’s Day), July 4th (U.S. Independence Day) and November 19th (possibly Thanksgiving). What do the other dates signify?

Bizarro Fun Fact: Calendar Man is often considered a pathetic joke enemy, easily dispatched by the Teen Titans or Power Girl. In the story for Batman: The Long Halloween, however, he is cast as a creepy and clever Hannibal Lecter-like character.


First comic appearance: New Year's Evil: Prometheus #1 (February 1998)

Arkham Asylum appearance: Penitentiary (Guard Room)

The connection: Prometheus is often described as the anti-Batman. Because he witnessed his criminal parents get gunned down by police while a child, he has committed himself to hunting down and destroying law enforcement. Prometheus is the ultimate “cop killer” and, therefore, one of the GCPD’s most wanted felons.

Bizarro Fun Fact: For awhile, the mantle of Prometheus was held by the son of a cop, who murdered his parents because they wouldn’t let him play videogames. Sigh.

Maxie Zeus

First comic appearance: Detective Comics #483 (May 1979)

Arkham Asylum appearance: Intensive Treatment (Patient Pacification Chamber)

The connection: Maximillian Zeus, like so many Batman foes, takes his name far too literally. He has a god complex, honestly believing that he is Zeus, the Greek god of thunder, sky and lightning. This explains the symbols and mythology book found in his Arkham Asylum cell, which is hidden behind a wall in the Patient Pacification Chamber.

That location is significant as well. In the graphic novel, Arkham Asylum: A Serious House on Serious Earth – the same story referenced for the Mad Hatter and Tweedle entries – Maxie Zeus is addicted to electroshock therapy, calling the currents “fire from heaven”.

And thus, the indignant clue from the Riddler: “Even I was shocked when I saw how Maxie Zeus was treated!”

Bizarro Fun Fact: In the same disturbing comic story mentioned above, Maximillian is implied to be a coprophiliac, meaning that he derives pleasure from feces. Come to think of it, his cell does look a bit dirty…


  • BrickLovesLamp - November 4, 2013 12:58 p.m.

    A lot of these villains ended up in either Arkham City or Arkham Origins. So now I'm convinced that any of the villains who didn't end up in one of those games will be in the next Arkham game, if there is one.
  • Rino98 - March 10, 2013 4:35 p.m.

    For the Ratcatcher- I think you can find the same book in the mad hatter's hideout in arkham city, door side of the table, on the ground.
  • coyoteDUSTER - October 14, 2011 9:16 p.m.

    "You won't send me to da coolah."
  • TheBiggestE - February 20, 2011 6:27 p.m.

    I think the book shown with the rat catcher's effects was "The Pied Piper"
  • Tendorphin - December 13, 2010 5:27 p.m.

    The book in the ratcatcher scene is probably a reference to the pied piper...he got rid of all of the rats in a village by hypnotizing them, and when the town didn't pay him he did the same thing to all of their children
  • nikrusty - August 19, 2010 6:28 a.m.

    woah cool, especially about "Mystery One-Armed Inmate". I was wondering who that was! It would be nice to see his real face and the rendered 3D version
  • Lolspamm0r - August 12, 2010 5:09 a.m.

    Another fun fact: Arkham Asylum is inspired by the asylum that goes by the same name in most of HP Lovecraft's works.
  • Ganonpork - August 10, 2010 9:21 a.m.

    XD that last guy was scarier than anything in Resi
  • Darkhawk - August 10, 2010 2:52 a.m.

    The Creeper had a 12 issue series in 1997, as well. In one of the storylines, he comes to Arkham to interview the Joker, only to have the Creeper persona take over and help Joker let the villains loose and take over the asylum.
  • chris4man - July 14, 2010 10:37 p.m.

    This article was awesome man , could u do the rest of the characters u forgot atleast the main ones in the game like harley , oracle, ivy, croc, crane,nigma, mr j etc , the more the better
  • nikeiden - May 19, 2010 9:21 p.m.

    The collectors edition of this game looks so cool it has the game, a behind the sceans dvd,A 14in colapsable batarang, and a journal of carecters that you find by doing the riddles
  • reaperman22 - April 6, 2010 6:01 a.m.

    i want to know who monty is as i just found the writing on the glass but i guess nobody knows as this is the place google took me
  • nikeiden - February 25, 2010 9:27 p.m.

    This game is the bomb. AvP game looks awsom too
  • GibsonSG - December 30, 2009 10:44 p.m.

    You are absolutely right videogameking, it does look like gordon freeman!
  • Axcleblade - December 17, 2009 12:28 a.m.

    Damn, I missed a lot. And these comments talk about multiple endings? Thank god for Youtube.
  • TheQu - December 7, 2009 4:17 a.m.

    Not that anyone is going to be reading this so far after the fact, but the Ratcatcher's book is likely a reference to Gilbert Ralston's book, The Ratman's Notebook. You may know it as Willard, as its been filmed twice. Willard was probably the inspiration for the Ratcatcher too.
  • kidcomic - October 30, 2009 8:18 p.m.

    has anybody found the hidden sevard head?if not i'm not kidding theres a sevard head sitting in a water filled jar in batman arkham asylum.(i'm seriosly not kidding)
  • Blinder - October 22, 2009 3:32 a.m.

    Here's a little fun fact I know of. Burgess Meredith had quit smoking before playing the part of The Penguin for the TV series. When he had to cough he turned the sound into the "Quack, Quack" and it stuck.
  • DryvBy - October 1, 2009 3:06 p.m.

    this is pretty cool stuff.
  • uglynarcissist - September 25, 2009 9:03 a.m.

    I love this article! There's so much I missed, so I'm totally going to have to replay. But the book found with the Ratcatcher's gloves is probably a copy of Ratman's Notebooks, the book that the movie Willard was based off of. Just fyi.

Showing 1-20 of 75 comments

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