Dark Conspiracy is set in the United States of the early 21st century after a "Greater Depression" has destroyed the global economy and left many countries isolated and bankrupt.
[1] Many American cities have expanded to form massive metroplexes, in some cases covering entire states.
Scattered throughout the Out-Law and even in the darker and more forbidding areas of the Metroplexes, zones known as "Demonground" are spawning mysterious "dark minions": monsters armed with deadly weapons.
[1] Players typically assume the roles of "Minion Hunters", people who have stumbled across this "Dark Incursion" and have taken up arms against it.
[2]: 60 Seventeen artists contributed artwork, including Larry Elmore (cover art), Earl Geier, Tim Bradstreet, Janet Aulisio and Elizabeth Danforth.
[2]: 60 The first edition also had numerous expansion volumes such as Empathic Sourcebook, Dark Races I, Protodimensions, PC Booster Kit, and Darktek; as well as several adventure modules, and a boardgame.
The rules also include an expansive illustrated list of equipment for use in the characters' fight, and pictures of many of the items, weapons and vehicles mentioned.
Michael A. Stackpole wrote three novels, the Fiddleback trilogy, set in the Dark Conspiracy universe that were published by GDW and released alongside the first edition of the game.
Editor Paul Pettengale commented: "Players take on the roles of people who have learnt of the evil forces at work in the world, and are struggling to defeat them.