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A handheld gaming device, the Steam Deck, is shown on a gray fabric surface. The screen displays the video game, Fallout London, with a scene featuring a detailed, post-apocalyptic cityscape with buildings and a large bridge. The device's controls, including a directional pad, buttons, and joysticks, are visible on either side of the screen. The device's interface at the bottom of the screen shows various icons and the time "8:46 AM" with the date "7/27/24.
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How To Install Fallout London on Steam Deck

I feel like we're all clamoring to get this up and running on our Steam Decks and I was no different. This guide is going to assume that you're using the GOG version of Fallout 4 GOTY Edition. I'll outline the quick steps that will get you up and running.

Jul 27, 20246 min read
  • Video Games
  • How To

A handheld gaming device, the Steam Deck, is shown on a gray fabric surface. The screen displays the video game, Fallout London, with a scene featuring a detailed, post-apocalyptic cityscape with buildings and a large bridge. The device's controls, including a directional pad, buttons, and joysticks, are visible on either side of the screen. The device's interface at the bottom of the screen shows various icons and the time "8:46 AM" with the date "7/27/24. I feel like we’re all clamoring to get this up and running on our Steam Decks and I was no different. This guide is going to assume that you’re using the GOG version of Fallout 4 GOTY Edition. If you’re looking for how to set it up using the Steam version of Fallout 4, Steam Deck HQ has you covered How to Play The Fallout 4: London Mod on Steam Deck. I’ll outline the quick steps that will get you up and running now and when I get a chance to pull the screenshots off my deck, I’ll add a more full explanation below.

As I play through the game and run into/fix items, I’ll be sure to update this post with the latest steps

Quick Steps

  • Setup a GOG account
  • Purchase Fallout 4 GOTY Edition
  • Add Fallout London to your account
  • Switch your Steam Deck to desktop mode
  • Open the Discover app and download Heroic Games Launcher
  • Launch Heroic Games Launcher
  • Log into your GOG account
  • Download and install Fallout 4 GOTY Edition
  • If you see a pop up saying that it could not find the default wine option and it asks you if you want to use proton experimental, choose yes
  • Launch Fallout 4 GOTY Edition which will finish setting up all of the required files
  • Exit Fallout 4 GOTY Edition
  • Download Fallout London
  • Launch Fallout London
  • You may see the same messaging about unable to find the default wine option, choose yes again
  • When you get to the option to install, quit Fallout London. I had to actually quit Heroic Games Launcher entirely at this point so if you do as well, launch Heroic Games Launcher again. I had to do this so that it would set the winepath properly for me.
  • On the Fallout London page, click the icon in the upper right that has the sliders on it (not the three dots)
  • Scroll down to the bottom and click on WINECFG
  • Click on the Drives tab in the new window that opens
  • Click on the add button and choose a letter, the choice here does not matter
  • For the new drive letter you just added, change the path to /home/deck.
  • Click OK and close out of the wine settings
  • Click on WINETRICKS (note if you don’t see this repeat the steps to get to where you saw WINECFG, this button will be next to it)
  • Select the default wine prefix
  • Select the top option of install a Windows DLL
  • You’re looking for faudio in this list. I had to click on one which showed the scrollbar on the right and then I could grab that scrollbar to find it.
  • Check the box for faudio and click OK
  • Now launch Fallout London
  • It will warn you that it could not find your Fallout 4 installation, choose the option to change location
  • In the window that pops up, on the left hand side, you’ll see a list of drive letters, choose the one you set in the previous steps (mine was D:)
  • Navigate through the folders until you’re inside of Games/Heroic/Fallout 4 GOTY
  • Click install
  • Once installed, close Fallout London and Heroic Games Launcher
  • Open up the file browser
  • Navigate to your home folder then Games/Heroic/Prefixes/Default/Fallout London/pfx/drive_c/users/steamuser/Documents/My Games/Fallout 4
  • Delete the file Fallout4Prefs.ini and Fallout4.ini, or you can rename them to have .bak extensions if you’re like me and can’t delete things
  • Download this Fallout 4 Steam Deck INI file and save it to the location where you just deleted the original Fallout4.ini file
  • You should now see just a folder calledF4SE and this Fallout4.ini file
  • Register for an account on Nexus Mods
  • Manually download the Buffout 4 mod
  • Open your downloads folder in the file browser
  • Extract the package for the Buffout 4 mod
  • Enter the F4SE/Plugins folder
  • Copy the folder Buffout4 as well as the files Buffout4_preload.txt and Buffout4.dll
  • Navigate to the folder Games/Heroic/Prefixes/Default/Fallout London/pfx/drive_c/users/steamuser/Documents/My Games/Fallout 4/F4SE/Plugins
  • Paste the Buffout files and folder here
  • Enter the Buffout4 folder
  • Double click on config.toml to open it
  • On, or around, line 25, change MemoryManager = true to MemoryManager = false and save the file
  • Close file browser
  • Open Heroic Games Launcher
  • Launch Fallout London
  • Quit Fallout London
  • Switch back to Game Mode and leave Desktop Mode behind
  • Launch Heroic Games Launcher
  • Go to Fallout London but don’t launch it just yet
  • Click the icon in the upper right with the three dots (not the slider one from before)
  • Click Add to Steam
  • Restart your SteamDeck
  • You can now launch Fallout London directly from Steam without having to go through Heroic Games Launcher anymore!

See you on the wasteland!

Full Setup

Screenshots coming soon!