2017 · キャンペーン設定（ゲーム世界）

Cthulhu City

A setting for Trail of Cthulhu presents a corrupted, nightmarish version of Arkham, where ordinary human life continues beneath alien rule. Cyclopean buildings, masked priests, ancient families, and Mythos creatures shape the city, while investigators question whether they are dreaming, insane, displaced in time, or finally seeing reality clearly. The setting supports a full campaign or an intrusion into an existing game. Investigators evade authorities who treat them as criminals, navigate rival cults and hidden districts, gather local knowledge, and decide whom to trust. New Suspicion rules support urban intrigue, and the included adventure The Whispering Light sends the group through Great Arkham and beyond.