It was originally published in December 1999 by Wizards of the Coast as the second campaign setting for the Alternity science fiction role-playing game.

Wolfgang Baur did considerable research into the occult, UFO, and government conspiracy theories in preparation for writing the Dark•Matter game.

The premise of the game is that nearly every strange or supernatural story ever widely told is true, but a web of conspiracies and secret organizations hide this truth from the average person.

It is a combination sourcebook and adventure which provides information on the organization known as The Final Church and pits the characters against them.

[5] In a review in the February 2000 issue of InQuest Gamer, Dan Joyce stated that Dark•Matter is "one of the best campaign settings" ever published by Wizards of the Coast and its subsidiary TSR, Inc.[1]