Projected visual supplement to the scenario "The Haunting" by Sandy Petersen from the role-playing game The Call of Cthulhu. Environments from the scenario are projected onto three walls, changing when players change location in the game. Along with the environments, video effects such as bleeding walls, flying knives, and a rising corpse appear in response to events that occur in the scenario.
The Call of Cthulhu measures characters' sanity, changing when they are presented with horrors, whether it be a gruesome murder scene or seeing an unspeakable trans-dimensional entity. Textured filters were added to the visual patina when characters lost sanity points.