 | For the company, see Mass Fusion (company). |
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The Mass Fusion Building is a location in the Commonwealth in Fallout 4.
Background
Publications
At ground level, Gunners fight through the rubble-strewn streets. Should you arrive on the roof (when the quest is active), prepare to fight your chosen rival faction, and hunt down a few choice items (including a Nuka Cherry). Beware the oil, gas leaks, and explosive barrels, or use them to your advantage.
The interior of the tower houses a huge number of office rooms within a central atrium and an impressive sky elevator.
Before the quest, you enter Mass Fusion from the ground floor and work your way up. On Level 5, look for the main trunk of items guarded by a Gunner commander, a Mini Nuke, and the Bobblehead, perched precariously atop the statue that looks out over the central atrium. You can’t go any higher unless the quest is active (or you have a Jetpack), so take the double doors to the west to exit out onto the exterior balcony, where you can fast-travel away. Or take the elevator on this level back down to the ground floor.
If you are here on the quest and have access to the upper levels, be sure to clear them of the scavengeable items as shown on the maps. Descend through the building, using the Executive ID Card you found on the roof to access the elevator to the Reactor Level. Come back with a jetpack, and you can reach some additional rewards on the highest levels of the building, which are otherwise inaccessible. These include a set of Freefall Armor for your legs inside the office of Jack Rockford on the 28th floor. Can you find it?
This location cannot be reached unless one of the quests is active. Make sure to grab a Hazmat Suit from the locker room or one of the control rooms before entering the decontamination arches—the radiation level in the Reactor Chamber is extreme. If you can manage the (Master) lock, use the terminals in the Control Room and the side office to disable the security system, or prepare for a difficult fight with robots on your way out.
Layout
Roof
The rooftop is an exterior location and has its own fast travel marker, the Mass Fusion Executive Suite. It is normally only accessible as part of the main quest endgame. The Mass Fusion Executive ID that allows access to the elevator down will not be present if no relevant quest is active.
Above glass floor
This section, starting on the eighth floor, is accessible from the roof by a quest-locked elevator. The area is mostly comprised of destroyed offices, with multiple caved-in floors creating one large interior space. This area will be abandoned if visited before Spoils of War or Mass Fusion (by using a jet pack power armor mod to fly up from the lower floors). During these two quests, the Sole Survivor will be ambushed by synths or the Brotherhood of Steel as they exit the elevator.
Below glass floor
This area includes the building lobby and some walkways and offices. It is accessible from the front door, and is occupied by Gunners if encountered before Spoils of War or Mass Fusion. When approaching from above while on one of the relevant quests, the battle with the opposing main quest faction will continue here.
Reactor room
The reactor room is below ground level; the Beryllium Agitator sought by both the Brotherhood of Steel and the Institute is located here. After dealing with area security, including turrets and Sentry Bots, the agitator can be found in a large, highly radioactive central room.
Loot
Main building
- Overdue Book - On the fourth floor, on a desk in the northern section; one will have to go up to the fifth floor then back down to the fourth floor to conveniently access this section.
- Strength Bobblehead - On the fifth floor, on the head of the giant statue.
- Mini Nuke - On the fifth floor, in the room to the northwest with the Gunner commander.
- Full set of power armor - On the fifth floor, worn by the Gunner commander.
- Mass Fusion labs key - On the eighth floor, on a desk in the northwest office.
- Two Stealth Boys - One is on the eighth floor, on a metal shelf next to the chemistry station. The other is in the same room as the Freefall Legs, on top of a small bookshelf.
- Tesla Science Magazine issue #5 - On the ninth floor, on a computer bank in the southeast.
- Fusion Core - Five floors from the top in a small room through a destroyed wall to the south, on a desk. Only accessible using a jet pack.
- Freefall Legs - Three floors from the top in a small room through a destroyed wall to the east, inside a Novice-locked safe. Only accessible using a jet pack.
- Jack Rockford's log - In the same room as the Freefall Legs, in the intern's terminal. Only accessible using a jet pack.
- Executive key and ID card - In the executive suite, inside the desk. Only accessible during Mass Fusion or Spoils of War.
Reactor
- Unique damaged hazmat suit - In a drawer right outside the decontamination room that leads into the reactor room.
- Two hazmat suits - One is in the locker room behind the attendant's terminal, sitting on a shelf of one of the lockers. The other is next to the analyst's terminal, on top of a safe.
- Fusion core - A Sentry Bot with the core spawns behind the northern security door, which can be opened through the Master-locked reactor security control terminal on the south side of the room before the reactor room. Alternatively, one can take the core and trip the security; the doors will then open automatically.
- Overdue Book - On a desk.
Notes
- The Mass Fusion Executive Suite map marker is not discoverable before the related quests.
- The rooftop of the building is the highest point the Sole Survivor can reach in the Commonwealth.
- One can leap from the southwestern corner of the roof and land safely in Goodneighbor without the use of power armor or Freefall Legs by aiming for the Old State House. The player character will be teleported to the main entrance of the settlement upon entering the cell.
- It is possible for provisioners and their Brahmin to appear on the roof, where they will be stranded and unable to leave.
- If the player character glitches into the reactor room, the Mass Fusion quest will begin.
- There are two radiation hazards in the reactor room. One is a generic radiation hazard that causes 30 radiation damage. The second is a hazard specific to the Mass Fusion reactor which deals 153 radiation damage.
- Swimming in the water in the reactor room will deal 50 radiation damage per second.
- Drinking the water in the reactor room will inflict 15 physical and 100,000 rad damage.
- Touching the agitator receptacle or the blue beam emitting from it in the reactor room will inflict 1 million damage irrespective of any perks, instantly killing the player character.
- Hacking the Master-locked reactor security control terminal in the southeast corner of the reactor level allows the player character to open the security doors: one leads to impassable rubble, while the other opens the facilities room and reveals an inactive Sentry Bot.
- There is a steamer trunk in the reactor room underwater on the northwest wall, below a "Danger Radioactive Materials" sign.
- Each time the player character leaves the reactor room, they are decontaminated and lose all rads.
- If the player character did not support their faction in Mass Fusion or Spoils of War, the enemy faction will replace the Gunners and take over the building after the quest. On the other hand, the player character's faction will control the location if they are assisted. If Spoils of War is completed successfully, the Brotherhood of Steel will occupy the building. If Mass Fusion is completed successfully, synths will occupy the building for the Institute.
Appearances
The Mass Fusion Building appears only in Fallout 4.
Bugs
The can chimes on the first floor do not disappear after collecting them, and one can repeatedly obtain XP and tin cans for activating them again.
- The bathroom scale trap on the first floor provides XP and materials upon disarming it, but the Tesla trap will still be triggered even after disarming the scale.
- Taking the large circular elevator from the lobby back up to the Mass Fusion Executive Suite sometimes causes the player character to arrive in the wrong location in the exterior cell - a location which was not intended to be accessible.
Gallery
Queue
Security office
Records
Office space
Cubicles
Small reactor
Ruins
Reactor
Reactor control room
Airlock
Jack Rockford's log can be ejected from the terminal
Freefall Legs in the safe, top left corner
