It turns out Amnesia: The Bunker has been quietly stressing players out using a well-known sound illusion employed in scary movies as well as Super Mario 64 to create suspense.
Amnesia: The Bunker creative lead Fredrik Olsson revealed that the latest entry in the venerable horror series uses a trick called a "Shepard Tone" to create the illusion of a sound that ascends or descends perpetually. The purpose of it is typically to heighten the player, viewer, or listener's level of tension, with just one example being the 'endless stairs' obstacle in Mario 64's Mushroom Castle.
