Prognostic is a first-person detective horror game built around authentic psychic practices. The player takes the role of a young man whose family died under circumstances that were never adequately explained. He is returning to the home of his deceased grandmother to accept her legacy and, in doing so, inherit her role as a medium — a prognostic. The goal is to find those responsible for his parents' deaths. The complication is that his predecessor has returned from death to collect a toll of her own, and has brought forces with her that will be watching everything he does. Each new night in the cursed town brings a new crime. The inhabitants' fates can be read to uncover the killers, the missing, and the motives behind why this place has become what it is.