Fusion Core

Inside a generator as you traverse the underground portion of The Gauntlet.

Nuka-Cade, in the corner of a room marked ‘Employees Only’ on the lower section.

In a generator next to some trailers.

After getting access to the Safari Adventure Welcome Center’s basement, explore it until you reach a flooded section. You’ll find the fusion core in a generator on your left.

On a beside table on the right side of the Overboss’ quarters (the raised section of Fizztop Grille.)

Cola-Cars Arena, inside a generator. Can be accessed by entering the locker room’s restroom and going through the hole in the wall.

Inside an Expert-locked room that you’ll find in the ‘residential’ part of the tour.

Inside a generator near the back door of the storage building.

Inside the suspended yellow cabin in the middle of the storage shed. Drop down from the second floor or use a jetpack to get inside.

Inside a generator in Beaver Creek Lanes. Go through the hole in the wall near the bowling lanes and follow the corridors to find it on your left.

On the lowest level of Acadia’s basement, behind a Master-locked door or terminal.

On a small table near the other offerings.

Inside a booby-trapped shed south-west of Northwood Ridge Quarry.

In the lower deck of the burning ship.

Inside a generator in a destroyed shed.

On top of some barrels in the small shack. May be guarded by an Angler.

Inside a beached boat. May be guarded by some Gulpers.

At the very top of the ship.

Inside a boat near the small dock.

Two cores are on the shelves of a shack directly in front of you as you enter The Nucleus, near Devin.

On a shelf in the train car near a spaceship.

Near the large teacup and spaceship.

In the tunnels beneath the junkyard, inside the mouth of a stuffed bear.

From the Red Rocket Truck Stop, walk downhill towards the south and you will find an entrance to a cave. The fusion core is sitting in front of a leaking container to the east.

In the Museum of Freedom’s basement. Access a Novice-locked terminal to unlock the door to the generator that has this core inside.

After you defeat Gristle and his raiders, as well as the Deathclaw, you can enter the tunnel from which the Deathclaw emerged. Go through the door which leads you into Concord Civic Access. Follow the winding waterway until you see an alcove to the right with the corpse of a raider, then head toward the back of this alcove and the core is on the ground to your left.

At the Starlight Drive In. Open a Novice-locked door behind the screen, then go left to find the core on a shelf.

Inside a generator in the basement of the USAF Satellite Station Olivia.

From the entrance to Super Duper Mart, head east to open a Novice-locked door. Take a right, left, and left again to find the core in a generator on your right.

Inside a generator in the basement of Mystic Pines. Can only be accessed via an Advanced-locked door.

Inside a generator in the ArcJet Systems Engine Core, in a room to the south on the bottom floor.

Outside the Federal Ration Stockpile, in a generator behind the cement building.

Inside the Federal Ration Stockpile, through a Novice-locked door in a room filled with broken catwalks. The core can then be found inside a generator in an unlit alcove.

Inside a generator on the ground floor of Kendall Hospital.

Inside the Cambridge Polymer Labs’ director’s office. Open the Master-locked door, or retrieve the CPL Director’s Key from Molly.

South of the BADTFL Regional Office. Head through the red building, and climb the stairs on the left to find the core in a generator.

At the Mass Fusion Containment Shed. Use a Supervisor’s Terminal on the upper floor to unlock the security door and reach the generator.

Found inside the generator on the roof of the Atlantic Offices.

Found in the basement of the Massachusetts State House, just after a tunnel full of Mirelurk eggs.

Found inside a rooftop generator opposite Vault-Tec Regional HQ.

Inside The Switchboard, an area accessed via sewer pipe nearby. The core is behind a locked security gate near the exit elevator.

Inside The Switchboard, accessed via sewer pipe nearby. The core is in a generator room, near where the sewers connect to an underground building.

Found behind a shed north of ArcJet Systems.

Inside a generator in the Vitale Pumphouse’s locked room.

Found inside Malden Drainage, an unmarked sewer that can be accessed through a pipe. You’ll find the fusion core in a generator on the upper-right side of the area.