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| This page lists all factions in Fallout 4. |
Major factions
- All four major factions can be joined in the course of the game. However, certain quests will turn factions permanently hostile:
- Institute questline
- Teleporting to Mass Fusion during Mass Fusion turns the Brotherhood hostile.
- Completing End of the Line requires wiping out the Railroad.
- Brotherhood questline
- Taking the Vertibird to Mass Fusion during Spoils of War turns the Institute hostile.
- Accepting Tactical Thinking turns the Railroad hostile
- Railroad questline
- The Brotherhood will automatically be hostile once Mass Fusion (a prerequisite for the rest of the Railroad quests) is completed.
- Minutemen questline
- To reach the Minutemen endgame one must make the Institute hostile, the easiest way of doing this is by killing an Institute scientist.
- The Institute is also made hostile by completing the quest Pinned
| Name | Joining | Companion | Benefits | Repeatable quests | Locations | Faction ID |
|---|---|---|---|---|---|---|
| Brotherhood of Steel | Complete Fire Support, Call to Arms, and Semper Invicta by accepting Danse's invitation to the Brotherhood. Rank is bestowed for completing main quests (not repeatable ones). | Danse | Free suit of T-60 power armor Vertibird transport Quartermastery, Cleansing the Commonwealth, Feeding the Troops, and Learning Curve repeatable quests Ability to turn in technical documents and viable blood samples in for money Vertibird Grenades to summon vertibirds |
The Prydwen Cambridge Police Station |
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| Commonwealth Minutemen | Complete When Freedom Calls and The First Step, accept the rank of General from Preston Garvey. | Preston Garvey | Minutemen and artillery support Additional Settlements Minutemen Flare Gun to summon Minutemen forces |
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The Castle (formerly) Museum of Freedom Sanctuary Hills |
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| The Railroad | Complete Road to Freedom. | Deacon | Access to ballistic weave mods from Tinker Tom Purchasable Stealth Boys Radiant quests: |
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The Switchboard (formerly) Old North Church |
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| Institute | Complete Institutionalized. | X6-88 | Constant supply of radiation-free water and edibles Player housing (Institute apartment) Access to and from the Institute Synth Relay Grenades to summon synths |
The Institute Federal surveillance center K-21B Boston mayoral shelter |
Minor factions
| Name | Services | Locations | Faction ID |
|---|---|---|---|
| Atom Cats | Power armor parts and modifications. | Atom Cats Garage | |
| Gunners | Not applicable - permanently hostile. | Gunners Plaza Quincy ruins Random encounters |
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| The Forged | Not applicable - permanently hostile. | Saugus Ironworks | |
| Diamond City Security | None. | Diamond City | |
| Neighborhood Watch | None. | Goodneighbor | |
| Church of the Children of Atom | Depending on player actions (usually hostile). | Crater of Atom Crater House Kingsport Lighthouse (initially) |
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| Cabot Family and Associates | Depending on player actions. | Parsons State Insane Asylum<br/.Cabot House | |
| Raiders | Not applicable - permanently hostile. | Concord D.B. Technical High School |
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| Super mutant warbands | Not applicable - permanently hostile. | Trinity Tower | |
| Crew of the USS Constitution | Depending on player actions. | USS Constitution | |
| Vault 81 | Depending on player actions. | Vault 81 | |
| Covenant | Depending on player actions. | Covenant The Compound |
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| Triggermen | Not applicable - permanently hostile. | Easy City Downs Vault 114 |
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| Pillars of the Community | Depending on player actions. | Charles View Amphitheater |
Add-on factions
Automatron
| Name | Services | Locations | Faction ID |
|---|---|---|---|
| Rust Devils | Not applicable - permanently hostile. | Fort Hagen satellite array Random encounters |
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| The Mechanist | Depending on player actions. | The Mechanist's Lair |
Far Harbor
| Name | Services | Locations | Faction ID |
|---|---|---|---|
| Acadia | Depending on player actions. | Acadia | |
| Church of the Children of Atom | Depending on player actions. | The Nucleus | |
| Harbormen | Depending on player actions. | Far Harbor | |
| Trappers | Not applicable - permanently hostile. | MS Azalea | |
| Robobrains of Vault 118 | Depending on player actions. | Vault 118 Cliff's Edge Hotel |
Nuka-World
| Name | Services | Locations | Faction ID |
|---|---|---|---|
| Hubologists | Depending on player actions. | Hubologist's camp | |
| The Pack | Depending on player actions. | Bradberton Amphitheater | |
| The Disciples | Depending on player actions. | Fizztop Mountain | |
| The Operators | Depending on player actions. | The Parlor |