Eldritch Horror: Masks of Nyarlathotep is an expansion for Eldritch Horror, a cooperative board game for one to eight players in which intrepid investigators must traverse the globe in an attempt to thwart the cataclysmic rise of an otherworldly Ancient One. Strange cults are gathering strength in remote corners and bustling cities all over the world. Though they seem to worship different gods, the investigators have found a thread that runs throughout all of the cultists’ horrific rites.