The Room 4: Old Sins (2018)

A dollhouse turns several connected rooms into one intricate object, and a small mechanism in one space can change what another room will reveal. Zooming, rotating and using the eyepiece make close inspection feel tactile rather than like searching a flat picture. Its clues mostly belong to the model and the devices you manipulate. Choose it for a solo mystery with a strong sense of physical construction, an optional hint trail and an eerie atmosphere that does not depend on a countdown.