Pandemoniums campaign setting is a fictionalized version of Earth that the game refers to as Tabloid World. In Tabloid World, all of the unlikely events described in tabloids are true, although most of the public does not believe so. People who know the truth about Tabloid World are referred to as Enlightened. Player characters in Pandemonium are Paranormal Investigators', Enlightened individuals who have left their regular jobs to research unusual phenomena for the fictional newspaper Weekly Weird News. Their adventures typically involve investigating sightings of tabloid staples like Elvis and Bigfoot in order to uncover larger mysteries and conspiracies.
System
Pandemoniums rules are divided into two groups. The E-Z Rules are a minimal ruleset intended for beginning players, and assume players use pregenerated characters included in the rulebook. The Very Complicated Rules allow player-generated customized characters and include more detailed rules for combat and other tasks. Pandemonium characters have three Attributes, which are described as bonuses to action rolls. For example, a Body score of "+1" gives the character a one point bonus to die rolls involving physical activities. Characters also have skills which provide adjustments to action rolls. Skills may derive from characters' Mundane Professions, Hobbies, or Paranormal Talents. Character actions in Pandemonium are resolved by rolling a ten-sided die, adding the relevant Attribute or skill bonus, and subtracting situational modifiers. If the adjusted result is six or higher, the character succeeds in the action. The Action Sum is then compared to the Fate Table to determine the degree of success. Players may improve their rolls by spending their characters' Instant Karma Points, which are earned in a manner similar to experience points in other games. One of Pandemoniums most distinctive rules involves past lives. In keeping with the game's tabloid theme, all P.I.s are reincarnations of historical figures such as Joan of Arc or Albert Einstein, who have skills and abilities far superior to a typical character's. If a P.I. successfully recalls a past life, the P.I. assumes the past life's personality and skills for ten minutes. The gamemaster in Pandemonium is called The Editor.
History
The game's core book, Pandemonium! is a 176-page softcover manual written by Stephan Michael Sechi, Robin Laws, and Joel Kaye. It was published in 1993 by MIB Productions, Inc. and distributed by Atlas Games. Pandemonium was the first role-playing game inspired by tabloid newspapers, predating the Amazing Engine-based Tabloid! by one year. MIB Productions and Atlas Games released only one accessory for Pandemonium. Stranger Than Truth is a 96-page collection of adventures written by Rob Heinsoo, Robin Laws, and John Scott Tynes, published in 1994. In the summer of 1996, Atlas Games publicly admitted that Pandemonium had "not found a solid market niche", and reduced its overstock by giving away copies of both products.