Unofficial Fallout 4 Patch - UFO4P
🟡 Updated this year⚠️ Install Order · 2 steps
Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.
Preview

🔍 Analysis
- 👍 2.0% endorsement rate — high engagement, a strong quality signal
- 🏆 #1 of 103 Bug Fixes mods in this game by downloads
📋 About This Mod
Requires Fallout 4 patch 1. 11. 221 or greater!
Requires ALL 15 Official DLCs.
A comprehensive bugfixing mod for Fallout 4. The goal of the Unofficial Fallout 4 Patch (aka UFO4P) is to eventually fix every bug with Fallout 4 not officially resolved by the developers to the limits of the Creation Kit and community-developed tools, in one easy-to-install package.
- Hundreds of gameplay, quest, NPC, object, item, text and placement bugs fixed.
- Created by the authors of the Unofficial Oblivion and Skyrim Patch series.
- No unsafe changes (such as deletions of stock objects).
- Designed to be compatible with as many other mods as possible.
For more information (ie the recent changelog, mods that UFO4P replaces) see UFO4P's threads on the AFK Mods forum here.
The complete changelog is posted here.
If you're experiencing a bug with Fallout 4, please report the bug to us in as much detail as possible on the UFO4P bugtracker. Please use search to ensure that you aren't submitting something that is already there.
Frequently Asked Questions - BUGS
Frequently Asked Questions - About the Project
Installation Requirements
Fallout 4 version 1. 11. 221 or greater, plus the following official DLCs:
Wasteland Workshop
Contraptions Workshop
Hellfire Power Armor
X-02 Power Armor
Heavy Incinerator
Enclave Weapon Skins
Enclave Armor Skins
Halloween Workshop
Tesla Cannon
Makeshift Weapon Pack
Enclave Remnants
DO NOT extract the contents of the BA2 files into your Data folder as loose files, or let your mod manager perform an equivalent function on the contents of the file. Doing so will cause things to load in the wrong order and break the game. Fallout 4 is intended to load BA2 files alongside their ESM/ESP files. Circumventing this causes issues which we will not provide support for. If you insist on going against this advice, you will receive no support for the problems you generate as a result of this.
After installing the mods, the following general load order needs to be followed:
Fallout4.esm
DLCRobot.esm
DLCworkshop01.esm
DLCCoast.esm
DLCWorkshop02.esm
DLCWorkshop03.esm
DLCNukaWorld.esm
DLCUltraHighResolution.esm (OPTIONAL)
ccBGSFO4044-HellfirePowerArmor.esl
ccBGSFO4115-X02.esl
ccBGSFO4116-HeavyFlamer.esl
ccBGSFO4110-WS_Enclave.esl
ccBGSFO4096-AS_Enclave.esl
ccFSVFO4007-Halloween.esl
ccBGSFO4046-TesCan.esl
ccSBJFO4003-Grenade.esl
ccOTMFO4001-Remnants.esl
Unofficial Fallout 4 Patch.esp
UFO4P is the definitive bugfix mod for Fallout 4, aiming to fix every unresolved bug using the Creation Kit. With over 212,000 endorsements and 10.7 million downloads, it's a community staple for any modded playthrough.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Massive community trust: 212,985 endorsements and 10.7 million downloads.
- Essential for modded playthroughs—most mods assume you have it installed.
- Actively maintained, last updated May 2026.
⚠️ Cons
- Requires all official DLCs to work properly—missing them causes issues.
- Large mod, may take time to download and install.
- Can conflict with mods that alter the same records—load order matters.
For every Fallout 4 player, especially modders, who wants a stable, bug-free experience. If you're playing vanilla, you'll still benefit from the fixes. Skip if you're a purist who wants the original bugs intact.
💡 Beginner Tips
- Install UFO4P first, before any other mods, and keep it high in your load order.
- Make sure you own all official DLCs—the patch requires them.
- Use a mod manager like Vortex or Mod Organizer 2 to handle installation and load order automatically.
📊 Mod Details
- Game
- Fallout 4 Mods
- Author
- The Unofficial Patch Project Team
- Version
- 2.2.1a
- Downloads
- 10,675,254
- Endorsements
- 212,985
- Category
- Bug Fixes
- Created
- 4/18/2016
- Updated
- 5/28/2026
🔧 How to Install Fallout 4 Mods
Download from Nexus.
📖 Full step-by-step install guide for Fallout 4 →
Visit the official mod page for specific installation instructions for this mod.
🎮 Need cheat codes or console commands? Check ur gaming wiki for Fallout 4 commands, item IDs, and more.
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