2022 · ソースブック（プレイを拡張するルール／オプション）

The Yellow Death

Set in the United States in 1927, this Call of Cthulhu scenario sends investigators undercover as patients at the luxurious Waverly Hills sanatorium. They are tasked with examining the suspicious death of a patient and reassuring his brother, but the evidence points toward consequences beyond any natural explanation. Designed for approximately three to five sessions, the scenario focuses on investigation, social interaction, and deductive reasoning. It includes detailed chapters, clues, NPCs, a branching narrative map, hand-drawn illustrations, handouts, a location map, pregenerated characters, and a printer-friendly version.