This was an early release with very little functionality, however some of this functionality may be useful. There was no technical support for this release.

F4SE will support the latest version of Fallout available on Steam, and _only_ this version. When a new version is released, we’ll update as soon as possible: please be patient. Don’t email asking when the update will be ready; we already know the new version is out. The editor does not currently need modification, however when available a custom set of .pex/psc files must be installed.

0.5.0 is compatible with runtime 1.10.20. You can ignore any part of the version number after those components; they’re not relevant for compatibility purposes.

Fallout 4 Tools
Current build 0003: fallout4_tools_0003.7z
Utilities to help with Fallout 4 modding. Currently includes:
ba2extract.exe – a command-line tool to extract the contents of ba2 files
scriptdump.exe – a command-line tool to disassemble pex files.

Update 3 includes a bug fix for ba2extract to unswap the width and height fields of textures.

What is the Fallout 4 Script Extender?

Fallout 4 Script Extender, also known as F4SE or FOSE is a community made modder’s resource that expands the scripting capabilities of Fallout 4. It’s required for a few mods that currently exist.

F4SE, the Fallout 4 Script Extender, is a modders resource that expands the scripting capabilities of Fallout 4. It allows mod authors to go beyond the limitations of the Creation Kit, which in turn, allows mod users to utilize them.

Just to name a few things that F4SE makes possible:
-Key Press detection
-Hot Key Remapping
-Extended Settlement Object Placement and Removal
-Higher Tier Facegen Sculpting
-New console commands
-and more…

I currently have two mods installed that require me to use F4SE. These mods are “Place Everywhere” which allow me to build settlement objects anywhere I want, such as in side of walls and terrain. The second mod is Achievements, which allows me to keep earning achievements whilst using mods. Bethesda decided to disable gaining achievements a whilst back for some unknown and bizarre reason.

How to install Fallout 4 Script Extender

Installing F4SE is a ridiculously easy task, but it can seem a bit confusing to anyone who has never done it or is slightly new to the modding world.

  1. Now you can choose to either use the installer, which will place all the files where they need to go automatically. Or you can download the 7z archive if you’re not someone who trusts running executable files.
  2.  If you’ve chosen the installer, just go through the setup and choose your Fallout 4 directory. It’s usually C:\Program Files (x86)\Steam\steamapps\common\Fallout 4 but varies person to person.
  3. If you’ve chosen the 7z archive, you’ll receive a ZIP File. All you need to do is highlight all of the files inside, and drop them into your Fallout 4 Folder. Again, this is usually at C:\Program Files (x86)\Steam\steamapps\common\Fallout 4 but may be different for you. You want f4se_loader.exe to be in the same folder as Fallout4.exe
  4. That’s it. You’ll just need to remember to update the Fallout 4 Script Extender whenever Bethesda updates Fallout 4. To actually use F4SE, you will need to run f4se_loader.exe instead of Fallout4.exe to run the game. Mods that require F4SE won’t run unless you run the game through f4se_loader.exe


The Fallout 4 Script Extender, or F4SE for short, is a modder’s resource that expands the scripting capabilities of Fallout 4. It does so without modifying the executable files on disk, so there aren’t any permanent side effects.


1. Copy f4se_1_5_157.dll, f4se_loader.exe, and f4se_steam_loader.dll to your Fallout installation folder. This is usually C:\Program Files (x86)\Steam\SteamApps\common\Fallout 4\, but if you have installed to a custom Steam library then you will need to find this folder yourself.

2. Launch the game by running the copy of f4se_loader.exe that you placed in the Fallout installation folder.

3. If you are looking for information about a specific feature, check f4se_whatsnew.txt for more details.

They have completely different purposes.

1. Make a back up of your /Data directory. You’re new to modding (and if you’re not modding you need neither of these programs) and you’ll make a hash of it at the beginning. Being able to go straight back to a clean /Data folder (instead of having to uninstall, clean out the directory, and then REDOWNLOAD THE GAME) will make all this a lot easier.

2. Install NMM, set it up.

3. Install F4SE *if* one of your desired mods requires it. Because there’s no reason to put it in unless a mod needs it as it does nothing on its own. It just extends the functionality of the game’s scripting language and if a mod doesn’t use that then it won’t do anything.

A – you can’t safely uninstall mods during a playthrough no matter what people say. So before you install a mod, make a save – that way you can uninstall and revert back to that save if you don’t like the mod.

B – only install one or two at a time until you’re used to how the mods interact. Load order is important, the lower the mod is in the load order, the higher its priority. Lower down mods overwrite higher up mods so if two mods change the same thing the lower mod ‘wins’ and its changes are what you’ll see in the world.


– Requirements
An Up-to-Date Version of FO4
F4SE only supports the most recent version of Fallout 4: . Outdated or stolen copies are not guaranteed to work properly, if at all.

For F4SE to work Fallout 4 must first be launched from one of its executable (.exe) files to establish its system registries and file paths.

7zip or WinRAR will be required to unpack the downloaded archives contents.


1. Downloading

-Navigate to . Locate the current build. At the time of this upload the current version is 1.9.4 . Select the 7z archive link. For easy access save the F4SE archive to your Desktop. You can delete the archive after it’s installed if you choose.

-Right-click the F4SE archive. Select Extract Here to unpack its contents. A single f4se folder will be extracted.

2. Installation

– From the archive read the following .txt files if desired and or delete as they are not needed:
– f4se_readme.txt
– fose_whatsnew.txt

Do not delete the CustomControlMap.txt file as it’s used for key binding.

If you are not a programmer and are adding F4SE to your game as mod, as the majority of us are doing, you can delete the src folder as well. However, this may be needed to create F4SE plugins and keeping it will not cause you any issues.

1. Highlight the remaining files and folders and copy them:
– CustomControlMap.txt
– f4se_1_9_4.dll
– f4se_loader.exe
– f4se_steam_loader.dll
– Data (folder)
– src (folder) *if desired

In a second window navigate to the Fallout 4 game folder: Steam\SteamApps\Common\Fallout 4
Paste the files and folders into the Fallout 4 folder.

3. Mod Manager Safety

In the rare case that you install a mod that accidentally contains an official f4se file we are going to pack the f4se Data folder into it’s own archive and load it into our Managers as a mod. Mods that include any of the official F4SE files could potentially break the F4SE scripts if they are only installed to the game’s Data folder since mod managers take precedence over, and or overwrite, Data folder files.

Leave the F4SE Data folder contents from the previous step exactly where we left it. It won’t hurt anything and it will be helpful in the case that you need to launch F4SE outside of your mod manager for testing or manual use.

– Within the F4SE folder, right-click the Data folder. Select Add to Archive. Name the archive F4SE Scripts. This archive is now a mod ready to be loaded into our mod manager.

– Place the archive somewhere safe, preferably wherever you store the other mod archives that you download. Open your mod manager. Use the function from the manager’s interface that allows you to import archives into your load order as seen on screen. Select the F4SE Scripts mod that we just created. Import it. Activate it. If you have the option move its position so that it has the lowest priority of all mods.


  1. Manual users:
    Navigate to: Steam\SteamApps\Common|Fallout 4. Right-click the f4se_loader.exe . Send a shortcut to Desktop. From now on you will launch the game via this executable. Some users may need to launch this as administrator.
  2. Mod Manager Users:
    To launch Fallout 4 through F4SE you simply have to run it from whatever third party application option is provided to you. If F4SE is not automatically detected, and it should be, navigate to Steam\SteamApps\Common\Fallout 4 and launch the game via the f4se_loader.exe. Doing this will establish the necessary file paths and allow your mod managers to detect it.

Various mod manager tutorials can be found in the description for those who need additional help.

Is F4SE Working?

– Launch Fallout 4 through F4SE.

– When you have made it to the game’s main menu use the tilde key “ ~ “ to open the console. Type GetF4SEVersion. Push enter. If a version is returned then you have properly installed F4SE. If an error is returned you need to double check the installation steps.


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