|For the quest in the Fallout: New Vegas add-on Lonesome Road, see The Reunion.|
|Main quest: Reunions|
|Follow Dogmeat, showing him each clue as it's found.|
|Enter Fort Hagen through the roof or garage.|
|Reach the ground floor and enter the Command Center.|
|Explore the area and find Kellogg.|
|Reward: Kellogg's pistol|
|Use the terminal to open the doors and leave Fort Hagen.|
|Talk to Nick Valentine.|
|Talk to Piper Wright.|
|Reward: 250+ XP|
|Leads to: Dangerous Minds|
Shadow of Steel
Dogmeat finds the scent of Kellogg and leads the party out of Diamond City, stopping at a small pond to the south. There is another San Francisco Sunlights cigar that needs to be picked up and shown to Dogmeat to continue the search. He follows the trail along the railroad tracks, where mole rats and other creatures may be encountered. At the underpass, Dogmeat will stop in a doorway. On the railing next to the doorway there are signs of Kellogg's blood, showing the bloody rag to Dogmeat will continue the search.
The trail continues across a bridge to the remains of an assaultron that can be spoken to for more clues. Depending on which way Dogmeat leads the party through the forest, there is a possibility they will run into a deathclaw sleeping in a small cave. On the outskirts of Fort Hagen, there are bloodied bandages on a fence that are the next clue for Dogmeat to follow. Eventually, the trail leads to the entrance of the fort where the doorway has been blocked.
Enter Fort Hagen, either by a roof hatch or through an exit door in the underground parking lot. Inside the facility are numerous synths and automated turrets guarding the building. The energy weapons bobblehead can be found in the kitchens of the command center. Deep in the facility, Kellogg begins talking to the Sole Survivor via the building's intercom, advising them to turn back. Eventually, the Sole Survivor comes to an office with a sealed door where Kellogg concedes that the Sole Survivor will not leave and opens the door so they can talk. During the conversation, Kellogg will reveal that Shaun is being held by the Institute, and thus out of reach.
Confrontation with Kellogg
The conversation will end with both parties stating that the other must die and a fight breaks out (it's possible to skip the conversation entirely by killing Kellogg at a distance). After Kellogg and his synth bodyguards have been killed, a nearby terminal will reveal clues on where to continue the search for Shaun. The password for the terminal can be found on Kellogg's body, along with his cybernetic brain augmenter which is needed for the next quest, Dangerous Minds, and his unique gun, Kellogg's pistol. The terminal will unlock the security doors which leads to the exit. The doorway that led into this final area will be closed and remain locked once the battle with Kellogg is started, preventing backtracking into the fort. However, the exit elevator becomes available at the opposite end of the same hall.
There is a hidden bonus for this battle: Giving chems to Mama Murphy while Reunions is active will result in her sharing a vision of the Kellogg confrontation, which will give the player character a perk called "Foreknowledge," which causes a 25% reduction to all damage received from Kellogg during the battle.
Return to Diamond City
Upon exiting the fort, a short scene plays where the Sole Survivor witnesses the Brotherhood of Steel arrive in the Commonwealth in full force, having traveled from the Capital Wasteland on board the Prydwen, which acts as their mobile base. Several Vertibirds will escort the Prydwen as it travels across the Commonwealth. The Brotherhood will announce their arrival via a loudspeaker and state that they are coming with peaceful intentions, but should not be interfered with. This starts the quest Reveille if one has not dealt with the Brotherhood before, or Shadow of Steel if they have.
Back at the Valentine Detective Agency, a conversation with Nick Valentine and Piper will complete the quest. If Nick was the player character's partner against Kellogg, after speaking with them, he will direct the Sole Survivor to talk to Piper at Publick Occurrences, where the next major quest of the main storyline will begin.
After this quest, Brotherhood of Steel troops and Vertibirds will start spawning across the Commonwealth, exploring, patrolling, and fighting raiders, super mutants, synths, and hostile wildlife.
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- Should one have Piper as a companion and dismiss her to a settlement just prior to this quest, she will not go to the assigned settlement but vanish and not appear until her appearance in the quest.
- Traveling straight to Fort Hagen and entering the building will automatically complete the first objective, making it unnecessary to follow Dogmeat halfway across the wasteland.
- Paladin Danse has a line of unique dialogue upon encountering the assaultron, commenting that "We're still on track. Hopefully he's not much further." This is despite the fact that he is not normally present during this leg of the main quest.
- Kellogg does not become hostile if mines are placed behind him before initiating conversation.
- If Nick was not brought along to Fort Hagen, the dialogue about how even he, a synth, does not know how to enter the Institute will trigger at the agency, rather than just one-on-one with him.
- After Kellogg states his synths are standing down, if the player character backtracks and begins combat from the hallway that overlooks the room, neither Kellogg nor his synths will use the doors that lead onto the hallway.
- After completing the quest, the note on the completed quest contains a typo. The text reads "But there way be a way to access his memories" when it should read "But there MAY be a way to access his memories".
- The Prydwen and Brotherhood of Steel Vertibirds will only appear if Fort Hagen is exited via the rooftop. If the player character exits the area by retracing their steps, it will present a "bug": The Brotherhood of Steel will not spawn has not entered the Commonwealth, and NPCs in Diamond City will comment on the "Blimp" being at the airport and such but it will not be accessible. To fix this, simply travel back to the fort and leave the building via the elevator to the roof and exit through the door, using the terminal inside the rooftop exit room to unlock the door.
- After completing the quest, Shadow of Steel may not trigger. [verified]
- Military frequency AF95 may not play. This can be fixed using the console command setstage 2bf21 1 This will teleport the player character to the roof of the Cambridge Police Station and tell them to board the Vertibird.[verified] After killing Kellogg, the Prydwen may not be seen in the sky and
- Once Dogmeat has found Fort Hagen, he may become stuck at the front entrance until entering Fort Hagen. [verified]
- Ness along the way to the fort, they will attack each other endlessly, rendering the quest impossible to complete unless the player character leaves him behind and travels to the fort on their own. [verified] If Dogmeat finds
- After using Kellogg's terminal a bug happens where any robot companion present has their name reverted to Automatron. And cannot be changed. No known fixes other than reverting to a previous save. [verified]
- tcl and/or disabling the final door with the console. Kellogg is unable to be talked to, but can still be killed as normal to complete the quest. [verified] It can also be fixed with the console command movetoqt 000229E7 which moves the Sole Survivor to the quest objective which results in Kellogg opening the door and the confrontation conversation with Kellogg still being an option. if Codsworth, Preston, and Dogmeat before this quest, it may trigger a bug where Kellogg's dialogue does not trigger in Fort Hagen, leading to a situation where the final door will not open, despite all the synths at Fort Hagen indicating that they are defending Kellogg. This can be fixed relatively easily with
- Hacking The terminal within the fort results in a bug that prevents the mag lock doors from opening (even if one has the password). [verified]
- If players reload to just before the final conversation with Nick and Piper, the conversation may replay from the beginning after finishing and selecting to stay with your current companion rather than go with either of them. This can happen multiple times in a row. [verified]