This Companion draws on decades of community discussions, actual plays (including The Old Ways and How We Roll), and essays from the Masks of Nyarlathotep Keeper’s Facebook group. No material is intended to infringe on Chaosium’s copyright — this is a non‑commercial, fan‑made supplement.
For the official Masks of Nyarlathotep campaign, purchase the current edition from Chaosium.
"I ran Masks for two years. The first year was chaos. The second year, after I found the Companion PDF, everything clicked. My players actually started taking notes because the handouts had so many clues." – Reddit Keeper. masks of nyarlathotep companion pdf
"The Companion saved my game during the Australia chapter. The original book gives you two paragraphs. The Companion gives you ten pages of Aboriginal mythology, colonial horror hooks, and a non-linear exploration system." – Yog-Sothoth.com user.
Canonically, many NPCs have one line of description. The Companion gives them: This Companion draws on decades of community discussions,
For example, the villainous Edward Gavigan in London transforms from a generic cult leader into a nuanced, terrifying antagonist with a tragic logic.
Masks of Nyarlathotep is legendary for its scope, but it is also infamous for its structural flaws. In the original versions, clues were missing, connections between chapters were tenuous, and Keepers were often left asking, "How do the players even know to go to the next location?" "I ran Masks for two years
The Companion addresses this head-on. It provides the "connective tissue" that was missing. It explains how the chapters link together, fills in plot holes, and offers logical reasons for why the investigators would travel from New York to London to Cairo to Shanghai. It takes the guesswork out of the Keeper's prep.