Backported Archive2 Support System
⚪ Last updated 2024⚠️ 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
- 👍 0.8% endorsement rate
- 🏆 #14 of 103 Bug Fixes mods in this game by downloads
📋 About This Mod
Do not install this mod if you're using game version 1. 10. 980 or later. It's redundant.
Requirements
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[]F4SE (0. 6. 23)
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]Address Library for F4SE Plugins (1. 10. 163)[]Pre-existing downgraded 1. 10. 163 versions of Fallout4.exe and steam_api64.dll. All other files (ESP, ESL, ESM, BA2, etc) may be safely upgraded to the latest game version. GOG Galaxy users need Galaxy64.dll in place of steam_api64.dll.
Custom Menu Mods
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[]For those using custom menu or interface mods, set this plugin to load before others. MainMenu.swf should be overwritten on purpose. Alternatively, you can delete the included MainMenu.swf file. The new bethesda.net menu isn't compatible with the old game version.
Installation Video
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[]A startup version line is logged to BackportedBA2Support.log in Documents\My Games\Fallout4\F4SE.
Source Code
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[]CommonLibF4 by Fudgyduff
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]Tim Van Vliet for the Striped Bass
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[]A startup version line is logged to BackportedBA2Support.log in Documents\My Games\Fallout4\F4SE.
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[]For those using custom menu or interface mods, set this plugin to load before others. MainMenu.swf should be overwritten on purpose. Alternatively, you can delete the included MainMenu.swf file. The new bethesda.net menu isn't compatible with the old game version.
This mod backports the BA2 archive format support from Fallout 4's Next-Gen update (1.10.980) to older game versions (1.10.163 and earlier), fixing crashes caused by the new format. It's a must-have for players who haven't updated but want to use mods that require the new archive system.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Huge community trust with 8,523 endorsements and over a million downloads.
- Directly addresses a critical compatibility issue for players stuck on older game versions.
- Simple, focused fix—no bloat, just the archive support you need.
⚠️ Cons
- Only relevant if you're on an older game version; if you've updated, you don't need it.
- Last updated in April 2024—may not cover future game updates or patches.
For Fallout 4 players who haven't updated to the Next-Gen patch but want to use mods that require the new BA2 format. Also for mod authors who need to support both old and new versions. Skip if you're on the latest version—this mod isn't for you.
💡 Beginner Tips
- If you're using a mod manager like Vortex or MO2, just download and install—it'll handle the file placement.
- Make sure your game version is 1.10.163 or older; this mod won't do anything if you've already updated.
- If you're a mod author, this lets you create BA2 archives that work for both old and new versions—test with this installed.
📊 Mod Details
- Game
- Fallout 4 Mods
- Author
- Nukem
- Version
- 1.0
- Downloads
- 1,036,856
- Endorsements
- 8,523
- Category
- Bug Fixes
- Created
- 4/30/2024
- Updated
- 4/30/2024
🧩 Commonly Used Together
Users add these mods to the same collections — a real compatibility signal, not an AI guess.
🔧 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.
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