"All of human history has been an occult war between those who would dominate humanity, and those who would liberate it. This war is still going on, hidden in plain sight." The Invisible College is an OSR ruleset for running a modern occult fantasy game. It is set in the modern world, but one where behind the surface of regular society there is a secret conflict to determine the future of humanity, being fought by different factions of occultists. - From back of rule book and interior introduction.