In the Mansion, step out of the bedroom in which you are staying and go to the second room to the right on the same side of the hall. Tap the first few bars of your high school fight song and open the door.
Pictures cover the walls from floor to ceiling. The ceiling, too, wears its share of photographs. They depict candid shots from your high school during your senior year. You find many familiar scenes as well as disturbing events of which you have no memory.
The human sacrifice is the worst.