ANBAL534

Updated more detailled guide: https://gist.github.com/ANBAL534/8057b5200ace9bdd98795b627e550ba0

Make steam force Proton 5.0-10 (Needs to be this version, no modern one because modern proton/wine versions have broken dotnet winetricks installs, needed to run the game)

* If at any stage of the steps wine asks you to install mono or gecko, just cancel/press 'no' on the popup and continue.
* If at any stage of the steps a info/warning/error message appears and asks you if you want to get more information in a webpage just cancel/press 'no' on the opoup and continue.
* If you mess up and need to restart the process from the start you have to manually delete the 'pfx' (steam's wine bottle folder) (/path/to/SteamLibrary/steamapps/compatdata/244210/pfx) and restart the process from the very begining.

Execute the game once and let it close
Then:

ANBAL534

If you want this guide to work on the deck, for easiness of following the guide, make your filesystem temporally writable 
and install protontricks regularly.

This is really an update for the guide found here https://github.com/ValveSoftware/Proton/issues/148#issuecomment-585921635

We will be using Proton 5.0-10 the only proton version that works good for assetto.

Before starting, make sure you have no pfx folder for assetto corsa, you can search for it in:
/path/to/your/SteamLibrary/steamapps/compatdata/244210