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This article is about the cosmetic item. For the comic, see Bombinomicon (comic). For the Bombinomicon wielded by Merasmus in Ghost Fort, please visit the links prior.
Hey, I'm a bomb book! It's pretty good.
— The Bombinomicon introducing itself

The Bombinomicon is a cosmetic item for all classes. It is a leatherbound and twisted-looking tome with glowing red eyes and glowing red gums, with a team-colored Demoman class icon on its "forehead." A large, bloodstained circle of jagged teeth in the center of the cover clutches a cartoonish bomb. A player that dies wearing this badge will be gibbed in a spectacular purple or gold explosion.

This badge is awarded to players who have earned the Dive Into a Good Book achievement by traveling to Loot Island through the portal that appears after MONOCULUS is defeated and collecting the Bombinomicon held within a cage there. The Bombinomicon can be awarded to multiple players who complete the listed specifications. Unlike many Halloween items, the Bombinomicon is not holiday-restricted. The explosion effect will appear regardless of time, however it will change based on the current day. During a full moon or Halloween, the explosion will be purple, while any other time during the year, the explosion will be gold.


Related achievements

Monoculus angry.png Eye-chievements

Dive Into A Good Book
Dive Into A Good Book
Get to Loot Island and claim your reward!

Update history

October 27, 2011 Patch (Very Scary Halloween Special)

  • The Bombinomicon was added to the game.

October 28, 2011 Patch

  • [Undocumented] Updated the distortion effect on the Bombinomicon.

November 22, 2011 Patch

  • [Undocumented] Updated the Bombinomicon effect to use golden particles outside of Halloween.

January 11, 2012 Patch

  • The Bombinomicon no longer shakes the screen and has a delay before the explosion so that Snipers, Spies, and others can get better feedback on the actual cause of death

June 26, 2014 Patch

  • [Undocumented] Updated materials for distortion effect of the Bombinomicon.



  • The name "Bombinomicon," a portmanteau of Bomb and Necronomicon, is a reference to the fictional grimoire from the The Evil Dead films which also had a face, was bound in flesh, and inked in blood. The name of the book from the film series was taken, as a tip of the hat, from the works of H. P. Lovecraft, which feature a grimoire of the same name.
  • The Bombinomicon in the Underworld of Eyeaduct, the Island of Ghost Fort and the Hell of Helltower have text written on the back, along with a discount price tag of $6.66, and the spine listing it as the 15th edition. The text on the back reads as follows:

Inked in the blood, bound in the hide and written on the stolen paper of British kings! With over 400 pages of spells, enchantments, recipes and anecdotes about blowing things up, the Bombinomicon is a must-have for the practicing explosives aficionado and demolitions expert alike. Now in its fifteenth printing, every copy of the Bombinomicon is guaranteed to be possessed by an angry talking ghost.

"If ye gaze at one tome this year, MAKE IT NOT THIS ONE" - Merasmus the Magician

"Unputdownable! This book's jaws are like a vice." - Gravel Pit Arts Monthly

"If you like the dark arts and explosions, this might very well be the best book you read all year." - Demolition Gazette

  • There are hidden images inside the pages of the Bombinomicon in Eyeaduct showing a monster wearing the Demoman grenades in a circle and other assorted Demoman and bomb-making paraphernalia.
  • Merasmus and Bombinomicon are voiced by the same voice actor, Nolan North[1].



  1. Email from a Valve employee