Grandchester Mystery Mansion

Grandchester Mystery Mansion is a haunted house exhibition in Nuka-World in 2287.

Background
This mansion was the family home of the Grandchester family, including Hannibal, Morticia, and their daughter, Lucy. Lucy Grandchester allegedly became possessed and murdered her parents, was committed to a mental institution, then escaped and committed suicide by hanging in the attic shortly after her 18th birthday. An indeterminate time later, this house was converted to a tourist attraction, taking advantage of the high traffic from the nearby Nuka-World amusement park.

Currently, the house is booby-trapped and is being used by Zachariah, an ex-Gunners member from the Mass Pike Interchange.

Layout
The house is locked, but entry can be obtained from the Protectron ticket taker working just outside the front entrance. The Sole Survivor can either buy a ticket, pick a ticket up off the ground by the Protectron's feet and present it to the Protectron, pass a Speech check to convince the Protectron that they are an employee, pickpocket the key off of the Protectron or destroy it and loot its remains.

This large building features several accessible floors. The tour of the building is linear, often locking the Sole Survivor within until the automated announcer finishes describing the current room and asks them to "please proceed to the next room." The tour moves through the main floor, right until the kitchen. In the kitchen is a Master locked door that leads to the basement. Inside the basement is a Novice locked door with a bloody scene containing six trader corpses and a glowing radroach.

From the main hall and from the kitchen are three stairs going to the second floor. The doors on the second floor accessible from the main room are all locked and need a key and are opened later as part of the tour. The door accessible through the kitchen is unlocked as it is part of the tour. The hallway upstairs is protected by an automated turret.

The second floor has several chambers. The first is rigged with gas and was used for seances. The gas can be turned off by using the terminal in the back left corner. The next hallway ends with dead end stairs and the bedroom of the child on the left. Adjacent to the child's bedroom lies the parents' bedroom, currently in use by Zachariah. In this room is a Master-locked door that leads to the attic, along with a locked exit to the building.

The attic contains both a weapons workbench and chemistry station, along with a large amount of junk.

Notable loot

 * Grandchester Mansion tickets - Sold by the ticket taker Protectron at the entrance of the mansion.
 * Grandchester Mansion key - One in possession of the ticket taker and another held by Zachariah.
 * 100 Paddle ball strings in ticket taker's inventory upon destruction.
 * Nuka-Punch recipe - In the room with Zachariah.
 * SCAV! #4 - On a wooden box in the attic, on the righthand side directly after entering the room.
 * A mini nuke - In the attic, just behind the steamer trunk, inside a metallic cart.
 * A Protectron model - In the basement, behind a Master locked door in the kitchen. After entering the room, it stands on the right on a tool board.

Appearances
Grandchester Mystery Mansion appears only in the Fallout 4 add-on Nuka-World.

Behind the scenes

 * The system narration within the mansion is voiced by Kiff VandenHeuvel.
 * The Grandchester Mystery Mansion itself is most likely based on the Winchester Mystery House, due to its similarity in name and history with supposed hauntings, seances and strange architecture meant to confuse spirits, such as doors and stairs to nowhere, windows overlooking other rooms, etc. The external appearance of the house and entry sign are almost identical to those of the Winchester mansion.
 * The style of narration is similar to that of the Ghost Host heard in the Disney Haunted Mansion attraction.

Bugs

 * Hacking to incite the Gunner Assaultron in the hallway beyond the seance room may cause it to chase the girl through the house. This will also cause a glitch preventing the player from proceeding any further through the mansion, needing to revert to a previous save file.
 * When the girl runs past the Sole Survivor, through the séance room, and to the upside-down room, attacking the girl may similarly prevent the player from continuing further in the mansion, as an invisible wall blocks the player from moving forward.
 * If you find the Grandchester Mystery House and do not enter the robot that grants access may no longer be there and you will not be able to get in.