Vault 118

Vault 118 is an unfinished Vault-Tec vault located beneath the Cliff's Edge Hotel, on Mount Desert Island, it is still accessible in 2287.

Background
Buried beneath the Cliff's Edge Hotel, Vault 118 was designed to function as an ultra elite hotel to attract test subjects of appropriate wealth and status. It was a clandestine area of the hotel to ensure that individuals drawn to privilege and exclusivity would be present. The original plan called for making the Vault open to the public when the Activation Notice was sent out (in the event of the Great War) and selected from the local working class population. These subjects would be taken through the exclusive areas of the vault on entry, but thereafter confined to cramped second wing. The Vault would remain sealed until test results could be determined.

The test group would include 10 ultra-rich, with every desire tended to by a robotic staff and placed above all legal restrictions in their interactions with the second group, numbering up to 300 people sequestered in uncomfortable, cramped conditions in the second wing. Any breach of ethics would be judged by the rich and any judgement enacted by the robotic staff. This classic bourgeois-worker set up was turned on its head when progress on construction of the second wing of the Vault completely stalled. Once the premiere area of the Vault was completed, funding was cut off. Ezra Parker, the key financier, simply pulled the plug, covering up with a story about troubles extracting payments from invited guests. Secondly, one of the subjects from Testing Group A (the rich) was a researcher for General Atomics on an advanced robotics program. He and his wife have convinced the other members of Group A that, with the international situation becoming tense, their best chance to outlast the war was to have their brains inserted into robobrains. When the Great War came around, the Vault was sealed. No outside persons were admitted, as the security protocols were taken over by the robobrains and the Overseer became the sole remaining human inside - the sole test subject in a Vault full of mad robobrains.

The robobrains continued to exist in isolation from the outside world, until a murder forced them to seek outside help: A detective.

Layout
Upon entering the lower level of the hotel, the vault entrance will be found with the door sealed. Activating the door controls will trigger a conversation with Maxwell, who asks the Sole Survivor if they are the detective he requested. Answering yes will open the door. Maxwell will be waiting for the player character in the front entrance. If Pearl is present due to recruiting the player character as the detective and escorting them, she will interject and answer instead.

Going right leads to an extremely lavish hallway with a large fountain. Straight from the fountain leads to the ballroom, where the murder took place. Right from the fountain goes to either Pearl's shop on the right or residences ahead. This residence hall contains a room full of display cases containing various items attributed to Ezra Parker's pre-War exploits, which leads to Ezra Parker's bedroom; Keith and Gilda's stage, with their adjoining bedrooms; and the classroom, which functions as Bert Riggs' lab and contains several tools and a chemistry station. A staircase at the back of the hall leads to the upper level.

Going left from the fountain, the player character can either go left into the security office housing four protectron charging stations, a desk and a staircase to the upper level, or right leading to another hall of residences. This hall houses Santiago Avida's art gallery, next to it is a decrepit bedroom that appears to belong to Santiago, though it appears he never uses it. Across the hall is Julianna and Bert's room (filled to the brim with assorted junk) and at the end of the hall is the showers. Beyond the showers is the beach, with sand and an artificial lake.

Going left from the main entrance is a short hallway filled with trash that leads to a sort of parking garage. A Corvega is suspended from a crane surrounded by nine garage doors on either side, three doors to a level. The large vault elevator, similar to that of Vault 111 and seen on the surface outside the hotel, can be found here. A hole in the wall on the center garage, second level right side, leads to a small cave with a bulldozer and crates. Beyond that is another small room with a door blocked by crates.

The upper level of the vault is in complete disrepair as opposed to the lower level. The overseer's office is found upstairs in the right corner of the ballroom. Inside, a desk takes up most of the main room and contains the skeleton of the overseer, which is wearing a Vault 118 jumpsuit, and the overseer's terminal next to him. Behind the desk is an entrance to the overseer's personal quarters, with a lavatory. The only other location upstairs is the hydroponics lab, across the ballroom from the overseer's office. A variety of plants can be found here, as well as at least one Concierge attending them.

Notable loot

 * Fencebuster, a unique blue baseball bat that can be found in the middle hall.
 * The Dapper Gent, a unique formal hat that can be purchased from Pearl.
 * Vault 118 jumpsuit, inside the vault, to the left on the counter, close to the entrance, where the residents would get their own.
 * Vault 118 overseer's log - on the overseer's terminal in his office.
 * Vault 118 overseer's key - In Ezra Parker's room. Opens the door to the overseer's office.
 * Request for detective - Carried by Pearl.
 * Road goggles inside a locked display case in the room flanked by lion statues.
 * Clean salt shaker, pre-War variant only found here, behind Pearl.
 * Cat remains, uniquely named vases in Julianna Riggs' room.
 * A red paint.
 * A pirate hat can be found on a bust in the "museum" room with the two lion statues at the entrance.
 * Four plastic skulls in a locked display case in the same room as the pirate hat; these are the only known plastic skulls in the game.
 * Letter to Ezra inside a wooden console in the recording studio; unlocks a moderate persuasion check with Gilda Broscoe and Keith McKinney.

Related quests

 * Brain Dead: The Sole Survivor is contracted by Pearl or Maxwell to help investigate a recent murder.

Appearances
Vault 118 appears in the Fallout 4 add-on Far Harbor.

Bugs
Upon leaving Vault 118 via the elevator, the player character may get stuck within the elevator. Reloading a previous save might help, some report that attempting a fast travel plus a few minutes wait time in the elevator fix it. Hearing elevator music upon loading may be an indication that you are no longer trapped.
 * An alternate fix is to press the 'Activate/Call' button for the elevator even if the elevator is at the basement level with the door open. Close doors, press the call button and then proceed to take the elevator as usual.