The Deep One is fought here as a boss.
The background music is "Delusion of Death".
It is also the only place where the player may here "Oh smania! oh furie! ~ D'Oreste e d'Aiace", an extract from an Opera written by Mozart.
- The theatre is named after the titular Phantom, from the 1925 version of Gaston Leroux's "The Phantom of the Opera", where he is known as Erik".
- The sign above the door showing the latest plays, reads "The Phantom Of The Opera", as yet another reference to the play movie.