Eternal Threads is a puzzle-adventure game played from a first-person perspective. You have to reconstruct the events of the past and try to save the six residents of a small house in England. You play as a certain "Forty-third", a man from the future who must prevent the death of six people. The gameplay boils down to the fact that you need to view past events and change them, find keys to locked doors and discover the secrets of the house's residents.