(For example, Elvis Presley is alive, aliens abduct people on a regular basis, and the Bermuda Triangle hides the lost continent of Atlantis.)

Player characters in Pandemonium are Paranormal Investigators (P.I.s), Enlightened individuals who have left their regular jobs (or Mundane Professions) 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.

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 Very Complicated Rules are being used).

(subtitled Adventures in Tabloid World) is a 176-page softcover manual written by Stephan Michael Sechi, Robin Laws, and Joel Kaye.

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 (Varney 1996).