Preparation

Enter Desktop Mode

If you are already using your device in Desktop mode, proceed to the next step immediately.

Before we begin, you will need to put your device into Desktop mode. This will allow you to use your device like a desktop computer, which will be critical for the remainder of this guide.

  1. Press and hold the power button on your device for three seconds. A menu dialogue will appear.
  2. Select the option marked Switch to Desktop.

Installing Protontricks

If you are installing the game with Heroic Games Launcher (GOG/Epic) proceed to the step immediately.

We will need Protontricks in order to manage and install closed-source Windows components that are not included by default in your Fallout: New Vegas installation. Installing Protontricks is as simple as clicking here and then clicking Install.

Installation

Choosing a Location

A clean installation is not only required to get rid of any potential leftover mod files, but also to make sure the game is installed in a safe location. Here is what you need to know when choosing where to install your game:
  • Install the game in the default library folder: This includes but is not limited to ~/.steam/steam/steamapps/common and ~/Heroic/Games

    Where should I install the game?

    Contrary to Windows, the default location is the safest location. This is because SteamOS does not let you access any system folders. Installing in the default folder also makes it easier to find the game files should anything go wrong.

  • Install on internal storage if possible: Having the game on your internal storage will drastically improve loading times and decrease stuttering.

Uninstalling the Games

If you have never installed the game before, go directly to the next section.

As the game is available on Steam and Heroic Games Launcher (GOG, Epic), there are separate instructions for each version. You obviously only need to follow the directions for the versions you have.

Steam

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  1. Open Steam and go to your Library.
  2. Find Fallout: New Vegas in the list.
  3. Right-click on it and select Manage -> Uninstall.

Heroic Games Launcher

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  1. Open Heroic Games Launcher and go to your Library.
  2. Find Fallout: New Vegas in the list.
  3. Right-click on it and select Uninstall.

If you have already uninstalled the games, make sure to follow step 4 to ensure there are no leftovers.

  1. Open the Epic Games Launcher and go to your Library.
  2. Find Fallout: New Vegas in the list.
  3. Click on 3 dots and select uninstall from the menu.
  4. Navigate to Documents\My Games\FalloutNV_Epic and delete all INI files inside it.

Installing the Games

As the games are available on Steam and Heroic Games Launcher (GOG, Epic), there are separate instructions for each platform. You obviously only need to follow the directions for the version you have.

Steam

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  1. Open Steam and go to your Library.
  2. Find Fallout: New Vegas in the list and select Install.

Heroic Games Launcher

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  1. Open Heroic Games Launcher and go to your Library.
  2. Find Fallout: New Vegas in the list and select Install.
  3. Set the Install to location to a location of your choice.
    • It is strongly recommended to install the game inside the default folder.

Post-Installation

Key Terminology

Now that the game is installed, there are two folders from it that will be referred to in the guide often:
  • Root folder: Where the game is installed.
    • For Steam:

      ~/.steam/steam/steamapps/common/Fallout New Vegas

    • For Heroic Games Launcher:

      ~/Games/Heroic/Fallout New Vegas

      (unless you manually changed the installation path).
  • Data folder: Where all of the game's assets are located.
    • For Steam:

      ~/.steam/steam/steamapps/common/Fallout New Vegas/Data

    • For Heroic Games Launcher:

      ~/Games/Heroic/Fallout New Vegas/Data

  • Prefix folder: Where all of the game's Windows compatibility files and saves are located.
    • For Steam:

      ~/.steam/steam/steamapps/compatdata/22380

    • For Heroic Games Launcher:

      ~/Games/Heroic/Prefixes/default/Fallout New Vegas

Generating Fresh INI Files

  1. Run the game from Steam or Heroic Games Launcher.
  2. Click OK to on the pop-up that says Detecting Video Hardware.
    • If there aren't any pop-ups, re-install the game, following the steps above and then try again.
  3. Click OK then Exit.