ACF patch tool (updated)

by FNFAL113·v1.0.4·Updated 2026-08-22

A portable Windows app for patching Fallout 4 Steam manifest files to prevent subsequent updates from breaking your mods

About this mod Machine translation

A portable Windows app for patching Fallout 4 Steam manifest files to prevent subsequent updates from breaking your mods

Original address:

Updated on August 20th:

Version 1.0.4

  • Get ACF metadata via GitHub gist instead of editing code and rebuilding the app

Everyone is tired of Bethesda ruining the mod list with unnecessary updates. Therefore, I (the original author FNFAL113, the same below) developed an automated Steam manifest file patcher to prevent your game from updating.

⚙️ Request

Windows 10/11.Net 9.0

❔FAQ

Windows Smart Screen detects unidentified app/publisher

——If you enter a conversation similar to the one below. This app requires registered publishers, which are expensive. Rest assured that the app is safe, but please do not download it from sources other than here and GitHub.

🔽 Disclaimer

This project or its authors are in no way affiliated, associated, authorized or endorsed by Bethesda, its affiliates or subsidiaries. Images, names and other forms of trademarks are registered to their respective owners.

You can freely compile the project on Visual Studio, and the compressed package provided here is a clean compilation of the binary file (related to the Win-x64 single file framework).

💖 Support projects/development

I develop stuff for free through focus and hard work. Sharing this project with other players or giving it a star on GitHub is a great way to show your appreciation!

Donations are welcome, it means a lot to me as an open source developer

Install & use Install: follow the bundled instructions

  1. Unzip the archive from playbuff and read the bundled readme / instructions first.
  2. There is no universal mod manager for this game: some mods replace game files directly, some go into a game-specific Mods folder, and some need a game-specific community loader or tool first — follow the bundled readme.
  3. Place the files exactly as the readme says; mods with listed dependencies need those installed too.
  4. Launch the game to confirm it loaded; some games require enabling mods in settings or an in-game mod menu.

Install locations vary a lot between games and mods — the bundled readme is the most reliable guide.

File & checksum

Filename
Fallout 4 ACF Patcher Tool 98605 1.0.4 2026-08-20T05-29Z kQvLeXXjI.zip
File size
434.8 KiB
SHA-256
57e341b8dbe06de84a5c5b846d67f0181a4f444424e9274c9556eae7abde3ef5
Stored at
2026-10-10 18:51