In the Dark Conspiracy game, demonground is the name given to an area which is being warped or corrupted by the encroachment of another dimension into our universe. Earthly things begin to become assimilated into forms more suited to the invading dimension, plant and animal life mutating and so forth.
Demonground is also the name of a freely downloadable PDF magazine which was the centre for Dark Conspiracy fan material during and after the Dynasty Presentations edition of the game. After DPI stopped publishing the game, the magazine expanded to cover all RPGs of horror and conspiracy old and new. Although Demonground has not seen a new edition since late 2002 the archives are still online