This is the last breaths of a dying universe.
The Ignotus is imposing itself on the world, pressing in and being guided through by powerful forces that seek to control the earth.
No one knows how long it has been there, waiting. Few know that it is there.
There are those who want to control it, and through it, control us all. The conspiracy is greater than anyone guesses. Because the theories are just a front.
In the Ignotus GM's Guide, you will get new creatures, rules for places of power, controlled substances, and (of course) the Ignotus dimension itself!