Fallout 4
84 Achievements
1,600
108-139h
Semper Invicta
Join the Brotherhood of Steel
10
24.7%
How to unlock the Semper Invicta achievement in Fallout 4 - Definitive Guide
Here's a video showing you from start to finish how to do this, all credit for the video goes to Alex from RandomChievo's.
Warning, video contains spoilers.
Once I completed the quest I was half way through level 6. Danse is a beast and will actually tank and kill everything for you.
I just followed this guide and worked out fine. https://www.vg247.com/2015/11/07/fallout-4-how-to-join-the-b...
Quest Giver: Paladin Danse
Location: Cambridge Police Station/ArcJet Systems
After raiding ArcJet's facility with Paladin Danse, finding the transmitter and returning to the surface, speak with the soldier. He will reward you with an offer to join the Brotherhood of Steel. Accept his offer and the Semper Invicta quest will begin. Now head back to the Cambridge Police Station and speak with Danse in order to unlock the achievement.
MISSABLE! - Completing the quest for the Institute called "Mass Fusion", will make the Brotherhood of Steel hostile and prevent you from completing their quests for good. Completing the quest for The Railroad called "Precipice of War" will also make the Brotherhood hostile! The game tells you this though before you do those actions.
Faction: Brotherhood of Steel
Quest Giver: Brotherhood of Steel Solider at Boston Airport/Military Radio Frequency AF95
Location: Cambridge Police Station
After you find Kellogg in the main story, you'll exit the building and see the Brotherhood of Steel Airship flying overhead. You'll get a misc objective to investigate it (unless you listened to Military Frequency AF95. Once you do, you'll get a quest from a solider to assist some soldiers at the Cambridge police station. Head over there and clear the place out to complete the first part of the quest.
You'll then need to speak to Paladin Dancs and complete the quest "Call to Arms". Doing this quest will then allow you to join the Brotherhood of Steel and unlock the trophy.
But there is still a possible bug that Paladin Dance will continue to shout Enemies! Fire! and you can’t go any further, you can’t talk to him => you can’t get a trophy, you can’t join the brotherhood.
- in the first dialogue "fuck off";
- in the second dialogue “forget”.
Next, we interrupt the conversation and be sure to!!! We approach Scriptor Heylin, she must say “I don’t understand. Are you playing the role of a hero - or a victim?” After this, we return to Dance, now he is ready to give further quests.
Further, there may be a bug during the quest “Call to Arms”. It consists of Paladin Dance escaping from Arcjet Systems and heading back to the Cambridge Police Station. In this case, you just need to follow the quest without paying attention to the absence of the paladin Dance nearby; he will appear after leaving the building.
Both bugs still exist on PS4 as of June 2022.
https://community.bethesda.net/threa...art=0&tstart=0
I found a solution by 'silenticecream' on gamefaqs that worked for me.
You need to progress the main story line to get the quest 'Molecular Level'. After getting the Courser chip and speaking to Virgil, you will have the optional quest to "Speak to the Brotherhood". When you return to Cambridge Police Station, Danse will have new dialogue options.
You MUST decline his first invitation to the Brotherhood. After falling, if you try speaking to Scribe Haylen or Knight Rhys, they should have new angry dialogue. (This is a good sign!) Then, when you go back to Dance and finally accept their invitation, 'Fire Support' will complete!!