Navigate to Documents\My Games\Fallout4 and delete the Fallout4.ini and Fallout4Prefs.ini files. This resets your configuration data. Phase 2: Installing the Base Game via GOG
This method utilizes the official installer provided by the Fallout: London team, which automates the process for GOG users.
Since the mod is exclusively distributed through GOG, you'll need a free GOG account if you don't already have one. You can create an account by visiting the official GOG website and clicking on "Sign In" then "Create Account".
Ultimate Guide: Fallout London v102iv233r7 GOG Install & Setup fallout london v102iv233r7 gog install
need to use a downgrader; it is already the compatible pre-Next-Gen version. Disable Cloud Saves
: Use the GOG Galaxy launcher to install the mod. This method often creates a separate installation or handles the folder paths automatically, saving significant drive space (approx. 70GB total vs. 109GB for manual installs). Troubleshooting & Technical Tips
Team FOLON is not resting on its laurels. Following the massive success of the base mod and Patch 1.02, the team has continued development. On September 30, 2025, they released , which adds even more content and improvements to the post-apocalyptic London wasteland. Since the mod is exclusively distributed through GOG,
If the game complains about missing DLC, check that Automatron , Far Harbor , and Nuka-World are all installed in GOG Galaxy.
If you previously modded Fallout 4 , uninstall it completely. Delete any leftover files in your Steamapps/common/Fallout 4 or GOG Galaxy/Games/Fallout 4 directories.
You must own Fallout 4: Game of the Year Edition (or the base game with all official DLCs) on GOG. The Next-Gen update on Steam requires complex downgrading, but the GOG version is natively compatible with Fallout London. Disable Cloud Saves : Use the GOG Galaxy
If the installer states your Fallout 4 is not the correct version, you may need to use the Fallout London Downgrader to revert Fallout 4 to the compatible v1.10.163.
Version (sometimes listed in technical forums as v102iv233r7) addressed this by introducing over 1,000 fixes and changes . According to Team FOLON®, this update was designed to make the mod "as solid as a rock". Major improvements included:
Ensure you have at least 100 GB of free space on a high-speed Solid State Drive (SSD). Installing this mod on a traditional HDD will cause severe loading screen delays.
Verify: After downgrade, right-click Fallout4.exe → Properties → Details – version should be 1.10.163.0 .
Ensure you have the Fallout 4: Game of the Year Edition on GOG, as it includes necessary DLCs like Automatron 1.2.3 .