How to play Fallout London on SteamDeck?

Fallout London, a mod for Fallout 4, changes the game's location from post-apocalyptic America to London. This DLC-sized mod offers a new and exciting experience of playing this title. It takes elements from British history and induces a nuclear theme. Gamers are excited to try it out as soon as possible, even those using the SteamDeck.

There are only a few known ways to run Fallout London on the SteamDeck right now. As you know, this handheld SteamDeck uses Proton to run Windows games on its Linux-based system. This mod is specifically designed for Windows, so you have to tinker with the SteamDeck to be able to play this game. It is essential to downgrade the version of Fallout 4 to be able to play Fallout London.

Note: The methods provided herein are not guaranteed to work for everyone.

---

Method 1: Using Windows on your SteamDeck

A scene from Fallout London reveal trailer (Image via Bethesda Softworks || @Team FOLON/YouTube)

The easiest way to play the game is if you have Windows running on your SteamDeck. You don't have to find any other workaround and directly use Steam and the GOG launcher to play the game. Fallout London is available for free on GOG's store; however, you need to own the main game to play it. Just add the game/mod to your library.

You can use the GOG Galaxy App to download the installer. If you have the game bought on Steam you must downgrade the game version to the pre-next-gen (Fallout 4 1.10.163.0) release of the game.

---

Method 2: Using a PC to install

Use a PC to install GOG Galaxy and then add Fallout London to Steam as a non-Steam game. Thereafter, enable Proton Experimental and install Fallout 4 from the GOG launcher. Launch Fallout 4 from the GOG launcher once to set up Fallout 4 settings and then get back to SteamDeck game mode. Now launch the GOG launcher and start Fallout London.

---

Issues you can encounter while playing Fallout London on SteamDeck

A scene from Fallout London reveal trailer (Image via Bethesda Softworks || @Team FOLON/YouTube)

Using Proton Experimental and installing the mod could cause some issues. If you see that your installed game files are deleted once you close Steam, you can add fs4se_loader.exe to Steam. Further, if you face sound issues, tinker with Proton or try installing xact64 files.

Check with the guides available from Team FOLON on how to install and play this game. As this is a new game there are bound to be some issues but be sure that developers are actively working on the fixes