[Quiet Man Cometh]

That would be the one. I believe there are slightly different endings to the game depending on what sort of villian uber-montstery thing gets picked. The game has you going back in time, gradually getting closer to the time you are in now in order to stop whatever uber-evil is trying to destroy the cosmos, or something like that. The main area is a mansion and you learn things about it from the trips back in time.