How to install and play FalloutCraft (Minecraft in Fallout 4)

Fallout 4 Next-Gen with F4SE, plus Minecraft on Fabric 26.3 or NeoForge 1.21.1: install both halves, launch in the right order, and learn the controls.

FalloutCraft brings the SkyCraft design to the Commonwealth. This guide follows v0.1.3 from zeyvu/FalloutCraft. New to mods? Read Start here first.

1. What you need

Fallout 4 on Steam, current Next-Gen runtime, tested on 1.11.240. The old-gen 1.10.163 runtime isn’t supported.
F4SE 0.7.9 or newer.
Address Library for F4SE Plugins, the All in One file (Nexus mod 47327).
Minecraft: Java Edition and a launcher you can make modded instances in (Prism, MultiMC, Modrinth, the official launcher, or CurseForge for NeoForge).
About 3 GB of spare RAM.
Recommended: a save from after you leave Vault 111.

2. Pick your Minecraft side

Use one of these, not both:

Option	Minecraft	Loader	Java	Jar
Fabric	26.3	Fabric Loader 0.19.5+ and Fabric API 0.161.0+26.3	25	`falloutcraft-0.1.3.jar`
NeoForge	1.21.1	NeoForge 21.1.x (tested 21.1.252)	21	`falloutcraft-neoforge-0.1.3+1.21.1.jar`

The NeoForge build lets you add other Minecraft mods, but shader packs (Iris/Oculus) and Sodium-style renderers don’t work.

3. Install

Install F4SE and Address Library.
Install FalloutCraft-0.1.3-FO4.zip from the Releases page with MO2 or Vortex. Or copy commonlibf4-template.dll into Fallout 4\Data\F4SE\Plugins\ yourself.
Make a Minecraft instance for your chosen option, and put the jar (plus Fabric API for the Fabric option) in its mods folder.

4. Launch, in this order

Start Minecraft first. Its window hides and waits for Fallout. That’s normal.
Start Fallout 4 through f4se_loader.exe (or MO2’s F4SE entry) and load a save.
Minecraft takes over after a few seconds.

To confirm the plugin loaded, open Documents\My Games\Fallout4\F4SE\commonlibf4-template.log. It should begin with “SkyCraft (FalloutCraft) plugin build”.

5. Controls

Key	Does
E	Fallout activate
Tab	Pip-Boy
Esc	Fallout pause
~	Console
F9	Quickload
I	Minecraft inventory (moved from E)
Shift	Sprint
Ctrl	Crouch
O	Minecraft menu

Everything else (F5, T, /, hotbar, mouse) is Minecraft’s.

6. Troubleshooting

Logs: commonlibf4-template.log, SkyCraft_crash.log, and Minecraft’s logs\latest.log.
Two jars installed causes problems. Keep exactly one falloutcraft jar.
Camera and movement mods conflict.
Known limits in 0.1.3: you can stumble on cracked ground. Fallout weapons and VATS can’t be used, and stimpaks don’t heal hearts. Charisma and Intelligence do nothing yet. Digging into the world, lights, water, NPC pathing, skill training and multiplayer haven’t been ported from SkyCraft yet. Deleting FalloutCraft_worlds.txt moves interiors.

7. Update or uninstall

Update: update both halves, the Fallout plugin and the Minecraft jar.
Uninstall: delete Fallout 4\Data\F4SE\Plugins\commonlibf4-template.dll, and remove the jar from your Minecraft instance.

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