doomgrader

Downgrade Doom Eternal on Steam to the pre anti-cheat version

Overview

This script can be used by Linux gamers to downgrade Doom Eternal to the pre anti cheat version. This will make the single player game playable again for linux users who bought the game on Steam and were screwed over by the anti cheat update. This script is an automation of steps put together by Campbell Jones. The original document can be found here

What does it do?

1. Gets DepotDownloader, a program for downloading old versions of games from the steamdb
2. Downloads the most recent working version of the game
3. Copies the old game files to your Steam directory so you are ready to play

Installation

1. Clone this repo git clone https://github.com/lpww/doomgrader.git
2. Change directory cd doomgrader

Prerequisites

• A fully updated Steam version of Doom Eternal
• Mono: See here for more information.

Config

Variables must be changed by editing the script before execution

• DOOMGRADER_ROOT: This is where doomgrader will store files. Games files will live in $DOOMGRADER_ROOT/files. DepotDownloader will live in $DOOMGRADER_ROOT/depotdownloader

  Defaults to ~/doomgrader

• STEAM_PATH: You will only need to change this if you have changed your steam games directory

  Defaults to the normal steam dir ~/.steam/steam/steamapps/common

Run the script

1. Make the script executable chmod +x doomgrader.sh
2. Run the script ./doomgrader.sh
3. Enter your Steam credentials when prompted (works with Steam Guard)
4. Wait for the download to complete (this can take a very long time)
5. Confirm that you want to copy the files to your steam games directory

Copying game files

The script will copy the downgraded game files to your Doom Eternal path automatically.

However, if the game gets updated by Steam, you will need to copy the downgraded files again. You can run the script with the -c option to only copy the files:

./doomgrader -c

Running the game

You should be able to run the game with Steam as normal. If a new update is released that doesn't fix the game, you will need to do the copy step again to replace the new games files with the working version. See the Copying game files section for more details

Cleanup

Remove all associated files by deleting the DOOMGRADER_ROOT. Eg rm -rf ~/doomgrader. This will remove all games files as well as DepotDownloader

Remove just the DepotDownloader files by deleting DOOMGRADER_ROOT/depotdownloader. Eg rm -rf ~/doomgrader/depotdownloader

Remove just the game files by deleting DOOMGRADER_ROOT/files. Eg rm -rf ~/doomgrader/files