The terror of the depths! The decrepit town of Innsmouth is sinking under the weight of its growing corruption. Ancient mysteries hide in the misty streets of the coastal Kingsport. The tide has begun to rise. The cold salt waves crash against the New England coast and thick fog descends upon the bay, obscuring small fishing villages that share the same state of twilight. Something dark crawls along the entire coast, strange lights move in the depths beneath the surface of the Atlantic, and the frequency with which the pale villagers disappear is becoming very concerning. It seems that Arkham is not the only town affected by strange events. In Dark Waters, your investigation shifts to Innsmouth and Kingsport with new neighborhoods, scenarios, investigators, monsters, and equipment for Arkham Horror. Prevent panic among the population, explore Devil's Reef or the strange house in the mist, and test your luck against the tyrants of the depths!