Elden Ring Proton Patcher

A tool aimed at enhancing the experience when playing the game on linux through proton.

Warning

This tool is based on patching the game executable though hex-edits. However it is done in a safe and non-destructive way, that ensures the patched executable is never run with EAC. Use at your own risk!

Features

set custom frame time limits (e.g. 30, 90, 165, ...)
disable black borders when using resolutions with an aspect ratio other than 16:9 (e.g. ultrawide).
vigniette removal

Usage

Copy the file er-patcher to the game directory.
In steam, set the game launch options to ./er-patcher ARGS -- %command% where ARGS is replaced with a combination of

-r RATE or --rate RATE for setting a custom framerate cap (default: 60)
-u or --ultrawide for removing black bars
-v or --vigniette for removing the vigniette overlay
Example: ./er-patcher --rate 30 -uv -- %command%
Example with mangohud and wine fullscreen fsr: ./er-patcher --rate 144 -uv -- env WINE_FULLSCREEN_FSR=1 MANGOHUD=1 MANGOHUD_CONFIG=histogram %command%

Launch the game through steam. er-patcher automatically launches a patched version of eldenring.exe with EAC disabled.

Windows

It should work on windows, just as well. The only difference is, that you need to run the script via your python 3 installation. Depending on the version of python 3 you have installed you would need a slightly different path than shown in the following example.

Example: C:\Program Files\Python36\python.exe er-patcher --rate 165 -uv -- %command%

How it works

When the game is launched through steam, the tool creates a patched version of eldenring.exe called eldenring.patched.exe while leaving the original intact. The tool then modifies the steam launch command by replacing the string start_protected_game.exe with eldenring.patched.exe so that the patched exe is always run without EAC. After the game is closed, eldenring.patched.exe is deleted.

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