Amnesia: The Dark Descent puts you in control of a young man named Daniel who is trapped in a castle without his memory. Daniel has forgotten the extent of his identity and has no idea why he in this creepy fortress. It is up to you to guide him through the castle's dim corridors, which also happen to be filled with monsters that you have no choice but to run away from.
The game has no combat and no weapons. Your only chance for survival is to run away from the horrors you encounter, while trying to keep a grip on your sanity.