Carl's Fallout 4 Guide
for PC, Xbox One, and PS4

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Fallout 4 Battle of Bunker Hill

Choices and Consequences: Informing the Railroad and Brotherhood of Steel

Bunker Hill. These gates will close, forcing you to fight your way around the back. It's an easy fight, and for now you're ignored. A patch may change the AI behavior, however - be warned.

The Battle of Bunker Hill takes place after Synth Retention. You are given the quest to recapture escaped Synths and return them to the Institute. However, as the quest dialog points out, you have the option of informing the Railroad and Brotherhood of Steel. This is a fairly simple quest if you do neither of those things. This guide will teach you the various outcomes, and how you can score loads of loot without damaging your reputation with any of the involved Factions.

Inform the Railroad or Brotherhood of Steel about the Battle of Bunker Hill There will be a battle whether you inform the other factions or not.

Informing the Railroad
Travel to the Railroad and speak to Desdemona. Her task for you will be to kill the Courser that escorts you to Bunker Hill, in order to free the Synths.

Informing the Brotherhood of Steel
Head to the Prydwen and speak with Elder Maxson. His task for you is to kill the Synths, in order to send the Institute a message.

Inform No One
This makes the quest just about the same - just go with the Courser and get the Synths, speak with them and use reset codes. I preferred the messy route, and you may as well. It seemed there were more fighters present when informing both factions. Inform who you want, you'll have a 3-way fight that is very action-packed no matter what you do. You'll get loads of loot from the dead, I recommend spilling your guts to both factions and killing those who have nice weapons.

Before you Go

Clear out you and your companion's inventory so you can carry as much as possible. I recommend not taking X6-88 if you plan to make everyone fight. This way, you can carry more. When I fast traveled away from here, the rest of the loot disappeared and you can only carry so much. Focus on weapons first (Gatling laser and Gauss Rifle), then BoS Power Armor. You should be able to get several fusion cores and plenty of cells for energy weapons. Don't bother with railroad armored clothing, as it can't be broken down.

A brotherhood of steel vertibird during the Battle of Bunker Hill The Battle of Bunker Hill is a frag-fest and you can score some great weapons and ammunition here if you've informed the Railroad and Brotherhood.

The Battle
As soon as you meet with the Courser, he will call for backup, knowing an ambush is waiting. The Brotherhood of Steel and Railroad will be there, and you'll be in the thick of it as all three enemies fight it out.

I have to wonder if Bethesda will not patch this in the future (watch notes for changes). At the moment, so long as you're 'in' the Railroad and Brotherhood and have completed their entry quests, you will have 0 hostility during this mission. Yes, if you engage any of the factions in combat you will not trigger hostility. Plus they show up no matter what you do, despite them saying things like, "Our intel said nothing of the sort". I encountered hostility ONLY whenever I killed enemies that were not in combat at all. It's a prime opportunity to get XP and loot, if you don't mind exploiting a potential bug.

Kill the Courser after the fighting's gone on a while. Maximize your loot. He can't die to AI fire, so you can finish him off whenever you like.

Should you Kill the Courser?
I like this - he has decent loot, and you're actually the only one who can kill him. He's on a rampage and can't die, unless you put a bullet in his head. I chose this route - this is the thing that really puts you in jeopardy of losing your spot in the Institute. IF you do NOT kill him, you can eventually work your way to the Synths.

There's really no reason to go down here. You can't actually get quest XP for freeing them, nor killing them. It's all about how you talk to Father afterward.

Deal with the Synths
Really, after the Courser is dead, you're told to speak with father on top of CIT ruins. You cannot complete the quest for the Brotherhood OR the Railroad. You can go toward the Synths, who are hiding in a sewer, protected by turrets (hostile to all) and railroad (not hostile) while Institute Synths fight it out and try to get more loot, but it's not even really worth it. I'd say let them live. For the record, I did kill them on a 2nd attempt, and couldn't turn-in to the Brotherhood nor did it impact my relationship with the Railroad. I also went through with the mission without informing anyone and returned the Synths to the Institute. Same outcome.

Railroad and Institute fight it out over the escaped Synths It is probably worth going into the basement, just to see the fight and get some loot off the bodies. Watch out for grenades! You should not bother with the Synths, and instead go talk with Father.

Speak with Father at CIT Ruins
You should've already been here, there may be fighting but Synths should be involved and on your side. Go to the right when you first enter, and find the staircase that isn't leading up to the balconies. It's a much wider staircase. There you'll find a door which leads to the roof. Don't wander the CIT building for 10 minutes like I did.

Speak with Father at the CIT Ruins You've gone this far, why ruin your relationship with the Institute? You've accomplished so much in this battle in getting so many radicals to kill one another. We can do better!

This is all assuming you killed the Courser. You can retain your relationship with the Institute so long as you choose NOT to say that you let the Synths go. 'It was my fault', 'ambush', and 'does it matter?' all lead to the completion of the quest and the beginning of Mankind-Redefined. I tested other options - there's a lot of dialog possibilities that lead to you not failing this quest, but this is the simplest way. If you do answer that you let the Synths go, then you are banished from the Institute and now can only complete the game with the Brotherhood of Steel or Minutemen (being banished in various ways is the only way to finish with the Minutemen).

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Share Tips and FAQs (7)

Justin Ayo
This is an amazing guide. Thanks so much for making it clear what the best choices are to stay neutral. Info is so hard to get about the possible outcomes on quests: your style of guide-writing is stellar. Keep it up, and thanks a million!
22nd February 2016 3:29pm
Awesome guide thanks.
A small not that can give you loads of extra caps and items.

If you wait long enough bodies will disappear in this mission. Also when you fast travel away everything is gone.

But you can pick up everything if you want and have the time.
Near the side entrance there is a milk bottle machine. You can put everything in there. This will not disappear when fast traveling. Just tried it out.

If you don't want to do this and want extra loot. Use a power armor to carry more.
11th July 2016 4:02pm
I'm glad that I know I can kill the courser and still remain allied to the institute for now because I have the quest underground undercover and it says to continue working with father. I need to complete that quest.
16th January 2017 5:21pm
False. I said I let them go and completed the quest. Even got Mankind Redefined. I just warped to the Institute to attend the Directorite meeting.
He was upset, but I'm in
23rd January 2017 5:10am
I talked to the Courser, then I activated a Stealthboy and ran straight into the basement.

I ran past all of the fights, directly to the synths. When I got to the synths, I asked why they were scared then said they were free to go. The Courser then became hostile, I killed him and walked back up.

Even though the fight had only been going on for maybe 2 minutes, there were lots of dead synths and "heavies" from the Railroad. Everyone seemed to have a Gauss Rifle (I saw a synth bend over and pick one up from a dead Heavy and start using it). Again, I fired on no one and just watched, until eventually the Railroad prevailed in the basement area. I looted everyone, walked upstairs where the ladder is and put all my heaviest stuff in the cabinets there. Then I walked outside.

Only one BoS was dead in the main fight area of the basement, outside they were killing synths and local raiders and 'winning'. I went around and started pickpocketing fusion cores from BoS once the fights had ended and found an infinite loot bug. You can pickpocket their fusion core, they will step out of their armor then get back in and a new fusion core will appear. Since you only have a 90% chance loot at perk level 4, save every couple of times and get as many FCs as you desire.

I looted all the bodies and once encumbered, I put the loot in a mailbox outside of Bunker Hill (everything inside is still owned). If you go to CIT, talk to father, then immediately return, you need to go talk to Kessler who will make you the leader of Bunker Hill and you can use the Workstation. You now 'own' all the Bunker Hill storage so you can go the mailbox you put everything in, retrieve it and then (slowly walk back) put everything in storage or sell it the vendors. Non named NPCs can be traded with and equip armor and weapons (lots of Institute rifles/pistols).
6th February 2017 8:18am
Forgot to mention, all the BoS were alive when I left for the CIT. When I returned, they were all dead.

My final tally was something like 8 complete sets of BOS 60b power armor, 2-3 Combat Armor sets, 5 Gauss rifles, 2 gating lasers, a minigun, 8 sets of Railroad Mk 1-4 armor, 6 sets of synth armor, 1 Courser armor, and a ton of Laser/Institute rifles. I probably looted around 50 fusion cores prior to heading CIT (became bored of looting).
6th February 2017 8:28am
Jim Ramos
I appreciate the clarification. I was numb struck when no one would react to me no matter what side I chose. I rarely go online for help but I'm glad I did on this occasion. Thanks
29th July 2017 10:45pm
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Far Harbor DLC Guides

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Pleae note there are different endings for this DLC, something we all wanted! It's like the actual end-game of FO4 in that you can choose the outcome.

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