Install Fallout: London with GOG Galaxy

Most Fallout: London install guides still focus on Steam downgrade steps, manual workarounds, and confusing setup advice.

That can be useful if you already own Fallout 4 on Steam and want to make that version work. But if your goal is simple — you just want to install Fallout: London with the least hassle possible — there is a much easier option.

Use Fallout 4: Game of the Year Edition on GOG with Fallout: London One-click Edition.

That is the setup I recommend if your main goal is getting into Fallout: London quickly, cleanly, and without turning the install process into a separate side quest.

Some of the links in this article are affiliate links. If you buy through them, I may earn a small commission at no extra cost to you. I only recommend the GOG version here because I genuinely think it is the easiest way to install Fallout: London.

▶️ Prefer Watching Instead?

This article is based on my video guide for installing Fallout: London using GOG Galaxy and the Fallout: London One-click Edition.

If you prefer watching the process step by step, you can check out the video version here:

Quick Answer: The Easiest Way to Install Fallout: London

The easiest way to install Fallout: London is to use Fallout 4: Game of the Year Edition on GOG and install Fallout: London One-click Edition through GOG Galaxy.

The basic process is:

Install Fallout 4 GOTY on GOG Galaxy
Make sure it is the English version
Disable cloud saves
Launch regular Fallout 4 once
Install Fallout: London One-click Edition
Launch Fallout: London from its own GOG Galaxy card

That is the cleanest route if you want to avoid the older Steam downgrade method.

Why GOG Is the Easiest Way to Install Fallout: London

If your main goal is to play Fallout: London, I recommend using GOG.

The reason is simple: the GOG version of Fallout 4: Game of the Year Edition is the easiest path into Fallout: London compared to the older Steam downgrade method.

That means you avoid a lot of extra setup steps that older Steam-focused guides are built around.

My practical recommendation is:

Use GOG for Fallout: London.
Use Steam for vanilla Fallout 4.

This keeps both versions separate and helps you avoid constantly reinstalling, downgrading, repairing, or undoing one setup just to play the other.

If you want a clean Fallout: London install, GOG is the less annoying option.

What You Need Before Installing Fallout: London

Before you start, make sure you have:

You need the Game of the Year Edition because Fallout: London requires Fallout 4’s DLC.

Also, the High Resolution Texture Pack is not required for Fallout: London, so do not worry about that unless you specifically want it for another reason.

Step 1: Install Fallout 4 GOTY Through GOG Galaxy

First, install Fallout 4: Game of the Year Edition through GOG Galaxy.

If you do not already own Fallout 4 on GOG, this is the version I recommend for Fallout: London:

Fallout 4: Game of the Year Edition on GOG

Try to keep this install clean. If you already have old mod files, partial Fallout: London installs, leftover tools, or failed setup attempts, a clean install is usually the safer option.

This is one of those cases where trying to save five minutes can cost you an hour later.

If your Fallout 4 folder is already messy, I would seriously consider starting fresh before installing Fallout: London.

Step 2: Disable Cloud Saves

Before installing Fallout: London, disable cloud saves for Fallout 4 in GOG Galaxy.

This matters because Fallout 4 and Fallout: London can use the same save location, and cloud syncing may create unnecessary save issues.

In GOG Galaxy, go to your Fallout 4 install settings and turn off cloud saves before moving forward.

This is a simple step, but it is easy to forget. Do not skip it.

Step 3: Create a Backup Folder for Your Fallout 4 AppData Files

If you plan to keep Fallout 4 on Steam and Fallout: London on GOG, I recommend separating your Fallout 4 AppData files before moving too far into the setup.

Fallout 4 stores important local files here:

C:\Users\YourUserName\AppData\Local\Fallout4

The problem is that Steam Fallout 4 and GOG Fallout: London can both interact with this Fallout 4 AppData folder. That can sometimes lead to missing plugin, wrong load order, or ESM errors if the wrong files are being used by the wrong version.

To avoid this, create backup folders so you can keep the Steam and GOG/Fallout: London files separate.

For example, you could create folders like:

C:\Users\YourUserName\AppData\Local\Fallout4 Steam Backup

and:

C:\Users\YourUserName\AppData\Local\Fallout4 London Backup

Before installing Fallout: London, copy your existing Steam Fallout 4 AppData files into the Steam backup folder.

Then, after Fallout: London is installed and working, you can keep a separate backup of the Fallout: London version as well.

This gives you a cleaner way to switch between setups instead of letting Steam Fallout 4 and GOG Fallout: London fight over the same local files.

Just remember: the game reads from the actual Fallout4 folder. The backup folders are there so you can copy the correct files back if something goes wrong.

Step 4: Install Fallout: London One-click Edition

Once Fallout 4 GOTY is installed, search for Fallout: London One-click Edition in GOG Galaxy.

You can find it here:

Fallout: London One-click Edition on GOG

Install it through GOG Galaxy and let GOG handle the setup automatically.

Do not overcomplicate this part. The whole point of the One-click Edition is to avoid manual file copying, downgrade tools, and old install headaches.

If you are using the GOG version, this is where the process becomes much simpler than the Steam method.

Step 5: Launch Fallout: London, Not Regular Fallout 4

Once Fallout: London is installed, launch Fallout: London from its own GOG Galaxy game card.

Do not launch regular Fallout 4 by mistake.

This is a common mistake because Fallout: London is built on Fallout 4, but you still want to launch the Fallout: London entry directly.

If any setup prompts appear, follow them and let the launcher finish what it needs to do.

Common Fallout: London Install Mistakes to Avoid

Here are the biggest mistakes to watch out for:

Buying base Fallout 4 instead of Fallout 4 GOTY
Forgetting to disable cloud saves
Skipping the first launch of regular Fallout 4
Launching Fallout 4 instead of Fallout: London after installation
Expecting Fallout: London to leave your normal Fallout 4 setup untouched

That last point is important.

Fallout: London is not just a tiny mod you casually switch on and off like a weapon texture mod. It is a massive total conversion built on Fallout 4.

That is why I recommend keeping things separate.

If you want Fallout: London, use GOG.
If you want vanilla Fallout 4, keep that on Steam.

My Recommended Fallout 4 Setup

If you are planning to play Fallout: London and you have not bought Fallout 4 yet, I would strongly consider buying Fallout 4: Game of the Year Edition on GOG for that purpose.

If you also want to keep playing vanilla Fallout 4, or you want a separate non-London mod setup, keep that version on Steam.

That gives you a clean separation:

GOG = Fallout: London
Steam = Vanilla Fallout 4

For most players, that is the least painful way to handle it.

You avoid constantly breaking one setup to fix another, and you reduce the chance of save confusion, mod conflicts, and install headaches.

Is Fallout: London Worth Installing?

Yes, especially if you want a fresh Fallout experience without waiting for a brand-new official Fallout game.

Fallout: London gives you a completely different setting, new factions, new quests, new weapons, new characters, and a very different atmosphere while still being built on the Fallout 4 engine.

That is what makes it so interesting.

It does not just feel like another settlement mod or a small quest pack. It feels more like a full alternate Fallout game made inside Fallout 4.

So if you already enjoy Fallout 4 and want something that feels familiar but fresh, Fallout: London is well worth a look.

Quick Recap

Here is the simple version:

Install Fallout 4 GOTY on GOG Galaxy
Make sure it is the English version
Turn cloud saves off
If using Steam and GOG separately, back up your files from:
C:\Users\YourUserName\AppData\Local\Fallout4
Launch regular Fallout 4 on GOG once
Install Fallout: London One-click Edition
Launch Fallout: London, not regular Fallout 4

That is the cleanest and easiest route if your main goal is getting into Fallout: London while keeping your Steam Fallout 4 setup separate.

Fallout: London Install FAQ

Do I need Fallout 4 GOTY to play Fallout: London?

Yes. You need Fallout 4 and its DLC, or Fallout 4: Game of the Year Edition. The High Resolution Texture Pack is not required for Fallout: London. The official Fallout: London site also states that Fallout 4 and all DLC, or GOTY, are required, while the High Resolution Texture Pack is not required.

Is GOG easier than Steam for installing Fallout: London?

Yes. GOG is the easier option because the GOG version works with the Fallout: London One-click Edition through GOG Galaxy. Steam can work, but it usually involves extra downgrade steps.

Should I turn off cloud saves before installing Fallout: London?

Yes. If you are using GOG Galaxy, disable cloud saves before installing Fallout: London. GOG’s own Fallout: London page tells players to disable cloud saves during the install process.

Do I launch Fallout 4 or Fallout: London after installing?

Launch Fallout: London from its own GOG Galaxy game card. Do not launch regular Fallout 4 by mistake.

Is the High Resolution Texture Pack required for Fallout: London?

No. The High Resolution Texture Pack is not required for Fallout: London.

Support Gman Reviews

If this guide helped you, one of the best ways to support Gman Reviews is by checking out Gman’s Emporium, the merch store connected to the channel.

I sell gaming-inspired shirts and designs for people who enjoy Fallout, strategy games, survival mechanics, and the kind of overthinking that somehow turns into a build guide.

You can also support the site by using my affiliate links for Fallout 3 and Fallout: New Vegas.

If you started with Fallout 4 and want to explore more of the older Fallout games, both are still worth playing today. They are also especially useful if you want to try Tale of Two Wastelands, a fan-made mod project that lets you play Fallout 3 and Fallout: New Vegas as one connected experience using the same character.

👉 Fallout 3 / New Vegas / Tale of Two Wastelands

Fallout 3 GOTY — GOG option / Humble Steam option
Fallout: New Vegas Ultimate — GOG option / Humble Steam option
Tale of Two Wastelands Mod

⚠️ Important: If you want to use Tale of Two Wastelands, make sure you choose the Steam version of Fallout 3 if using the Humble link, because the Windows Store version is not supported.

📚 Read More

Read More Article About Fallout 4 Guides, Fallout: London Guides.

How to Install Fallout: London Using GOG Galaxy