Yukichigai Unofficial Patch - YUP
🟡 Updated this year⚠️ Install Order · 5 steps
Install in this order, then this mod last — most mods fail to load without their framework and dependencies in place.
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🔍 Analysis
- 👍 2.0% endorsement rate — high engagement, a strong quality signal
- 🏆 #2 of 110 Bug Fixes mods in this game by downloads
📋 About This Mod
So, it has come to this....
I've been making bug fixes for Fallout: New Vegas for years. It was inevitable, really. Sooner or later I was bound to have a direct hand in some kind of bug fix compilation for the game, rather than just sitting back and letting someone else do all the hard work of merging and checking compatibility. Others had filled the role in the past - Zenball, Dynastia, Linmor, more I'm sure I'm forgetting - but they've moved on, and now it's my turn.
So here it is: my effort in creating a successor to the various Community Bugfix Compilations and Inofficial Patches. I give you (drumroll please):
Yukichigai's Unofficial Patch
(Or "YUP" for short)
I know, terribly inventive name. At least it abbreviates well.
What is Yukichigai's Unofficial Patch anyway?
YUP (as I'm going to call it) is just what it sounds like: an unofficial patch for Fallout: New Vegas. YUP addresses a number of bugs, exploits, and other such issues with Fallout: New Vegas that were not fixed by the final official patch to the game. There are enough bugs left in the game that having some mod which fixes them is vital, and (in my slightly biased opinion) YUP meets that need admirably.
So what does it fix?
A lot of bugs in the main game as well as all DLCs (Courier's Stash, Dead Money, Gun Runners' Arsenal, Honest Hearts, Lonesome Road, and Old World Blues).
What bugs? Well it's a really, really long list, several pages in fact and too much to put in the main description. You can check the full list of fixes by checking the ReadMe section for this mod. If you don't want to though, here are some examples:
- Fixes the Dead Money perk In Shining Armor so that it actually does something
- Corrects the female mesh for the Pimp-Boy 3 Billion so that it's not held at an angle
- Fixes Boone's head tracking and stops him from holstering his weapon every 5 seconds in combat
- Alters Fixer so that it cures addiction temporarily as it says, not permanently
- Ultrajet addiction can now be cured by doctors
- Stops various NPCs and creatures who begin the game dead from miraculously resurrecting 3 days later
- Ensures the Brotherhood of Steel Explosive Collar won't detonate after its removed from your neck
- Prevents the Old World Blues trait Skilled from being taken, then removed to leave a permanent +5 to all skills.
And many, many more things after that, including all of the currently relevant bug fixes I have ever released. If it's broken, YUP probably fixes it.
Okay, what doesn't it fix?
As of v8, I am happy to say that YUP includes every bug fix
YUP is the definitive bug fix compilation for Fallout: New Vegas and all its DLC, merging hundreds of fixes into a single ESM. It's the only pure bug fix mod on the Nexus, adding no new features or balance changes. Essential for any modded playthrough, with over 104k endorsements and 5.3 million downloads.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Community-approved with over 104k endorsements—this is the gold standard for FNV bug fixes.
- Pure bug fixes only, so it won't mess with your gameplay or balance—just makes the game more stable.
- Actively maintained, last updated May 2026, so it's still relevant for current mod setups.
⚠️ Cons
- No new content or restored features—if you want that, look elsewhere.
- Requires a clean install order and compatibility with other mods; not a plug-and-play for everyone.
- As a single ESM, it can conflict with mods that alter the same records—check compatibility patches.
For any Fallout: New Vegas player who wants a stable, bug-free experience without changing the game's balance or content. Essential for modders building a load order, and a must-have for vanilla purists. Skip if you're looking for new quests or gameplay overhauls—this is purely about fixing what's broken.
💡 Beginner Tips
- Place YUP at the top of your load order, right after the official DLC, to ensure it patches base game records first.
- If you use a mod manager like Vortex or MO2, let it handle the ESM—just enable it and let LOOT sort your load order.
- Check the mod's compatibility notes for patches if you're using popular overhauls like Project Nevada or JSawyer—some need specific patches.
📊 Mod Details
- Game
- New Vegas Mods
- Author
- Yukichigai -maintained by sandbox
- Version
- 13.9.1
- Downloads
- 5,305,207
- Endorsements
- 104,731
- Category
- Bug Fixes
- Created
- 8/15/2013
- Updated
- 5/8/2026
🔧 How to Install New Vegas Mods
Download from Nexus.
📖 Full step-by-step install guide for New Vegas →
Visit the official mod page for specific installation instructions for this mod.
🎮 Need cheat codes or console commands? Check ur gaming wiki for New Vegas commands, item IDs, and more.
Keep browsing — more New Vegas mods await