The Mechanist's Lair

The Mechanist's lair is a location and settlement that appears in the Fallout 4 add-on, Automatron.

Location
The Mechanist's lair is located slightly north of the East Boston Preparatory School. It is behind a building that is unmarked, and near a warehouse that is by a bridge, and a small wharf. Upon completion of the DLC, it is a new player home.

Background
The Mechanist's Lair was originally a RobCo sales and service center which sold terminals. Employees of the service center were told specifically not to interact with any abnormal crates, or else they would be "taken to see our friends below." In a storage room for the center, a large door which requires an M-SAT to enter leads into a large underground General Atomics base used for the construction of robobrains. It functioned as a pseudo-prison which housed prisoners, who were later operated upon to remove their brains. After wiping their brain of memories and passing assorted tests, the brains would then be housed in a robobrain head and mounted to any of a number of devices, including the bodies of a normal robobrain, controlling stretchers, or even controlling operations inside the control center.

Sometime before the events of Automatron, Isabel Cruz discovered the facility while scavenging and took it upon herself to use it to create an army of robots to save The Commonwealth from anything which may hazard humans.

Inhabitants

 * The Mechanist
 * Sparks

Notable loot

 * A fusion core can be found in a generator after entering the Mechanist's lair. Right hand side before the laser grid.
 * Eyebot model on top of some filing cabinets in the locked room with a skeleton hanging out the window, across from the generator.
 * A Vault-Tec lunchbox is located by a skeleton at the end of the robot storage area (underneath a yellow eye protection poster). Another is located behind the generators at Power Substation B on a red stepladder.
 * A Mr. Handy model and the lead engineer's holotape are located on a desk next to the chief engineer's terminal in the quality control area.
 * Three Nuka Cola Quantums.
 * One can be found in a crate after the fourth gate.
 * Another can be found on the raised left side when the ramp goes down, by Jangles the Moon Monkey and a cymbal monkey playing video games.
 * Another can be found in the room with the assembly lines.
 * Several robot parts models are scattered around throughout the interior.
 * In a locker just after the Power Substation A where the floor becomes flooded.
 * A second model is located on a shelf behind a master locked terminal in the research wing.
 * A third model is in the brain extraction area of the research labs near a terminal.
 * Facilities director's holotape next to a locked (novice) ammo box by the facilities management terminal.
 * Mr. Gutsy model behind the watch station terminal desk just after entering the research wing.
 * Forfeiture terminal password located behind same desk as above.
 * Protectron model is found in a surgical tray by a terminal in the cell observation area located above the cells.
 * A Stealth Boy located at the end of the cell observation area on a box to the right of a hole in the floor.
 * Chief scientist's holotape is located in the brain extraction area of the research labs near a terminal.
 * Two fusion cores and a mini nuke located in the corner of the room room to the left of the incinerator.
 * Mechanist's armor and matching helmet can be collected at the end of Restoring Order.
 * Eyebot pod schematics are on a table in the Mechanist's bedroom.
 * Mechanist's log found in the Mechanist's bedroom.
 * Drawing of the Mechanist found in the Mechanist's bedroom, on the table next to the bed.
 * Sentry bot model found in the Mechanist's bedroom, near the bed.
 * Overdue book on a small shelf near the Mechanist's bedroom.
 * Mini nuke on the shelf in the room at the end of the hall across from the elevator.
 * Spotlight schematics on the blue terminals in the room at the end of the hall across from the elevator.
 * Medical terminal password - can be found on a quantum robobrain guarding the facilities management room.
 * RB-2851 master control password - given by the Mechanist during Restoring Order or taken from her body. Shuts down the security.

Appearances
The Mechanist's lair only appears in the Fallout 4 add-on Automatron.

Behind the scenes
The doors in the lair open in a similar pattern to the ones from the Robot repair center from Fallout 3. Although unlike Fallout 3 the doors cannot be closed

Bugs

 * After completing the final quest, leaving the building may cause the game to crash.
 * Fast traveling directly to another location, rather than leaving through one of the doors, may solve the issue.