Masks of Nyarlathotep material is insane (in a probably good way)

While originally designed for older editions (like the 4th or 6th), the lore and narrative advice remain highly relevant for the 7th Edition Slipcase Set from Chaosium , though stat blocks may need slight conversion. Availability Note

: Offers deep mechanical and narrative support for Game Masters (Keepers) attempting to run the notoriously complex campaign.

If you are a Keeper staring down the barrel of running Masks , It is the ultimate safety net, ensuring that even if your players go off the rails, you will have the material to keep the story moving forward.

The is a supplement to that. It is not a replacement.

Rumors persist of a deleted "Miskatonic University" prologue and an expanded "Shanghai" section. The Companion includes many of these cut or suggested expansions, allowing you to prolong the campaign or add new layers of dread before the investigators ever leave the United States.