Crucible is a side quest added with the next-gen update in Fallout 4 (FO4)! Read on to learn how to complete the Crucible quest and the rewards for completion!

Crucible Walkthrough

Crucible Objectives

1. Head to the Saugus Ironworks
2. Enter the Main Entrance
3. Hack the Terminals (Option A)
4. Find Another Way to the Other Side (Option B)
5. Kill the Forged Keeper
6. Read the Forged Keeper's Notes
7. Unlock the Forged Keeper's Toolbox
8. Access the Smelter Terminal
9. Stop the Molten Metal Flow
10. Move the Crucible at the Smelter Terminal
11. Retrieve the Buried Items
12. Equip Flame-Resistant Power Armor Legs
13. Take the Heavy Incinerator

Head to the Saugus Ironworks

Map Location
Overworld

Head to Saugus Ironworks located on the eastern side of the map. There will be many Forged enemies guarding the area.

Enter the Main Entrance

After clearing the area, head inside through the main entrance just in front of the building. There will be around three Forged enemies in this room, kill all of them.

Hack the Terminals (Option A)

Use the stairs up to the second floor of the building and hack the Advanced level terminal to open the door, provided that you have the Level 1 Hacker perk.

Hacking Explained: How to Hack Terminals

Find Another Way to the Other Side (Option B)

If you don't have the hacker perk, head up the stairs once again to reach the top level. Go through the wooden planks at the top level and you'll find a way to the other side. The room will have more enemies to fight.

Kill the Forged Keeper

The quest marker will point you towards the Forged Keeper. You have to kill him to advance the quest. You can also see the Heavy Incinerator in front of him inside the crucible.

Read the Forged Keeper's Notes

Pick up the Forged Keeper's Notes and read it to advance the quest. It will tell you about what they did with the Heavy Incinerator.

Unlock the Forged Keeper's Toolbox

Follow the quest marker that leads you up the stairs in the same room towards a toolbox. Unlock the toolbox with a bobby pin and grab the Forged Recruit's Notes and Smelter Console Password. Read the Forged Recruit's Notes in your inventory.

Access the Smelter Terminal

Proceed to the Smelter Terminal right next to the room and unlock it using the Smelter Console Password. It will tell you to stop the molten metal pipeline before you can control it.

Stop the Molten Metal Flow

Head back down to the area where the Forged Keeper was, you'll find a button there to stop the Molten Metal Flow. Press the button and head back to the Smelter Terminal.

Move the Crucible at the Smelter Terminal

Move the crucible using the Smelter Terminal.

Retrieve the Buried Items

Head back down and retrieve the buried items under the crucible. You should be able to obtain two Power Armor Legs and Flame Resistant mods for each of them.

Equip Flame-Resistant Power Armor Legs

Head to the Power Armor Station just next to the area. Attach the Flame Resistance mods to the legs and equip them on the armor.

Take the Heavy Incinerator

Get in the Power Armor and head to the crucible in front of where the Forged Keeper was. Grab the Heavy Incinerator from inside the crucible.

Crucible Rewards

Heavy Incinerator

Weapon	Damage	Weight
Heavy Incinerator	30 Physical 49 Energy	16.1

The quest rewards you with the Heavy Incinerator that uses Flamer Fuel for ammo to launch fireballs that deal heavy area damage and burn enemies. The Heavy Incinerator will come with the Ghoul Slayer effect making it deal 50% extra damage to ghouls.

Heavy Incinerator Location, Ammo, and ID

How to Unlock Crucible

Automatically Added to Quest List

Crucible is automatically added to your quest list in the Pipboy after exiting the vault as a new character or loading a previous character from before the 2024 next-gen update.

Fallout 4 Related Guides

All Side Quests List and Best Side Quests

Side Quest Guides

Next-Gen Update Quests
When Pigs Fly	Best of Three
Crucible	Speak of the Devil
All Hallows' Eve	Echoes of the Past
Pyromaniac	-
Side Quests
The Silver Shroud	The Devil's Due
The Big Dig	The Memory Den
Public Knowledge	Trouble Brewin’
Long Road Ahead	Special Delivery
Pickman's Gift	Human Error
Vault 81	Pull the Plug
Here, Kitty Kitty	Hole in the Wall
Diamond City Blues	Confidence Man
Cambridge Polymer Labs	Order Up
Mystery Meat	The Disappearing Act
Out in Left Field	Vault 75
Dependency	Here There Be Monsters
Curtain Call	Painting the Town
Emogene Takes a Lover	Short Stories
Banished from The Institute	Last Voyage of the USS Constuitution