Nocturnum: Deep Secrets

The third and final book in the campaign, this sourcebook brings investigators to the brink of insanity as an ancient conspiracy and malign evil threaten humanity. As the world descends into chaos, they follow leads from Copenhagen to Moscow and beyond the sea, uncovering secrets that challenge everything they know. It includes a sequence of connected chapters, from the opening crisis through the final confrontation, along with handouts. The background and adventures are written for Call of Cthulhu and can be adapted to other horror roleplaying systems.