The owners of the house are gone; they will not return. But the housekeeping robot still continues to clean dust, make food for them, trim their lawn... Sounds familiar? Yes, the melancholic first part of the game is basically Ray Bradbury's There Will Come Soft Rains. But then the author takes the premise in a new direction.
They Will Not Return is a short science fiction story in the classical spirit: you should play it if you like Bradbury and Asimov. It's the third game by John Ayliff that features an AI protagonist; and his AIs are wonderful - not too humanlike, not too machinelike, touching and sympathetic. (When playing Seedship, I cared about the player character as much as about the success of its mission.)