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| 1 | +--- |
| 2 | +title: Fallout London |
| 3 | +layout: default |
| 4 | +nav_order: 1 |
| 5 | +parent: Game-Specific Instructions |
| 6 | +--- |
| 7 | + |
| 8 | +# Installing Fallout London |
| 9 | + |
| 10 | +Fallout London is a mod for Fallout 4 that's only available via a GOG-provided installer. This means that the installation process is a bit different from other games. |
| 11 | + |
| 12 | +### Prerequisites |
| 13 | + |
| 14 | +- Make sure you have Fallout London added to your GOG library. As of writing (*20 March 2026*), the mod is available for free and can be claimed [here](https://www.gog.com/en/game/fallout_london). |
| 15 | +- Download Fallout London from GOG, but *do not* run the installer yet. |
| 16 | +- Download a *clean* copy of Fallout 4. Ensure you have version *1.10.163*, as this is **REQUIRED** for Fallout London. |
| 17 | + - The GOG version of Fallout 4 is recommended, as it is on *1.10.163* as of writing. |
| 18 | + - If you have the Steam version, you will need to downgrade it to *1.10.163* if you haven't already. There are a variety of guides and tools available online to help with this process. |
| 19 | + - Make sure to run the game at least once so the prefix files are generated and detectable by MO2-LINT. |
| 20 | + |
| 21 | +### Installation Steps |
| 22 | + |
| 23 | +#### Method 1: Direct Installation |
| 24 | + |
| 25 | +1. Run the Fallout London installer you downloaded from GOG. |
| 26 | +2. Click 'Install'. |
| 27 | +3. If it hasn't automatically detected your Fallout 4 installation, click 'Change Location' and navigate to the Fallout 4 installation directory (not the Data folder, but the main folder containing `Fallout4.exe`). |
| 28 | + - Note: The built-in file browser can be buggy and is known to double-click folders, resulting in you having to navigate back up to the correct directory. Be patient and careful when navigating. |
| 29 | +4. Run the installer and wait for it to finish. It may take a while, so be patient. |
| 30 | +5. Once the installation is complete, you can proceed to set up MO2-LINT for Fallout London. |
| 31 | + - Note: Fallout London already includes F4SE, do **NOT** use the `-s` or `--script-extender` option when setting up MO2-LINT for Fallout London. |
| 32 | + ```bash |
| 33 | + mo2-lint install falloutlondon |
| 34 | + ``` |
| 35 | + |
| 36 | +#### Method 2: Installation via Mod Organizer 2 (Slightly Advanced) |
| 37 | + |
| 38 | +1. Run MO2-LINT with the `-s` or `--script-extender` option to set up a new profile for Fallout London. For example: |
| 39 | + ```bash |
| 40 | + mo2-lint install falloutlondon -s |
| 41 | + ``` |
| 42 | + - In contrast to the direct installation method, you **must** use the `-s` or `--script-extender` option with this method. This is because the GOG installer itself does not include F4SE, but rather downloads it during installation. |
| 43 | + - Optionally, you can install F4SE as a Root Builder mod by adding the `-p root-builder` option. This will keep your Fallout 4 installation clean. |
| 44 | +- Optional: Set variables for easier copy-pasting. It can make the process easier. Example commands will use these variables, but you can also just replace the paths in the commands with the actual paths if you prefer. |
| 45 | + ```bash |
| 46 | + export INSTALLER_DIR='<path/to/installer>' # Fallout London download directory |
| 47 | + export MO2_DIR='<path/to/mo2>' # Mod Organizer 2 instance directory |
| 48 | + ``` |
| 49 | +2. Run Mod Organizer once to create the profile. When setting up the profile, ensure you have 'Use Profile-Specific INI Files' enabled. You can choose to enable 'Use Profile-Specific Save Games' as well, but this is optional. |
| 50 | +3. In your file explorer, open both the MO2 instance directory and the Fallout London installer directory. |
| 51 | +4. Copy the `Data` folder from the Fallout London installer directory to MO2's `mods` folder. You can rename the folder to something like `Fallout London` if you wish. |
| 52 | + ```bash |
| 53 | + mkdir -p "$MO2_DIR/mods/Fallout London" |
| 54 | + cp -r "$INSTALLER_DIR/Data"/* "$MO2_DIR/mods/Fallout London" |
| 55 | + ``` |
| 56 | +5. Copy the contents of the `__AppData` and `__Config` folders from the Fallout London installer directory to MO2's profile directory (i.e. `profiles/Default`). You will likely need to make the filenames lowercase to match MO2's expected filenames. |
| 57 | + ```bash |
| 58 | + for f in "$INSTALLER_DIR/__AppData/"* "$INSTALLER_DIR/__Config/"*; do |
| 59 | + cp -v "$f" "$MO2_DIR/profiles/Default/$(basename "$f" | tr '[:upper:]' '[:lower:]')" |
| 60 | + done |
| 61 | + ``` |
| 62 | +6. Open MO2 and enable the Data mod, or whatever you named the folder in Step 4. If you installed F4SE as a Root Builder mod, make sure to enable that as well. |
| 63 | +7. You can now run Fallout London through MO2. |
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