Cabinet of Perturbation

The Cabinet of Perturbation is a large dungeon located under the mansion of Justine Florbelle, a sociopathic woman from the 19th century who utilizes the dungeon as a torture chamber. It is the main setting of Amnesia: Justine.

History
Justine grew up as a mentally disturbed woman incapable of feeling true emotion, other than sadism. She then took over her father's, a psychoanalyist, research and opened a complex under her manor to treat mental disabilities. In reality, it was just a torture chamber where Justine soothed her sadism, as well as a place of revolting psychological tests where the captured victim must either kill other hostages imprisoned in the dungeon, or solve complicated puzzles in a small period of time, sometimes while being hunted down by mentally broken and deranged torture victims of the dungeon.

Three of these deranged victims are the suitors, three men formerly romantically involved with Justine, who hunt Justine down in her own dungeon after she devises a test on herself to see if she has any morality or humanity in her. She then drugged herself with an Amnesia potion, released the Suitors to attack her, and constructed several hostage situations to see what her drugged self would do in such situations.