Adapted from this guide, to be more accurate for (my) Arch Linux
Install AC from Steam
Force Proton compatibility version to 5.0-10 (right click Assetto Corsa in Steam library, select Properties..) and try to run the game - it will prompt you to install .NET 4.5.2, accept it. It will crash after that, that is to be expected.
Run the wine configuration tool using that same version of Proton on the game's wine prefix:
WINEPREFIX=/home/$USER/.steam/steam/steamapps/compatdata/244210/pfx WINE=/home/user/.steam/steam/steamapps/common/Proton\ 5.0/dist/bin/wine winecfgIf you're getting the following error, shutdown and wait for Steam to fully exit and try the step above again
wine client error:0: version mismatch 621/755.
Your wineserver binary was not upgraded correctly,
or you have an older one somewhere in your PATH.
Or maybe the wrong wineserver is still running?
Install .NET 4.7.2 in the game's wine prefix (this still needs to be done on Proton 5.0, higher versions don't work yet)
protontricks 244210 -q dotnet472
If the installation isn't successful, then leave it be for now, and come back to it later after switching the proton version a few times, and restarting Steam. I could not find a consistent way of installing .NET from scratch...
Though it is only possible to install it with Proton 5.0, at least from my testing.
Download and extract the Assetto Corsa CM into your downloads directory, then copy it to the Assetto Corsa Steam folder as 'Content Manager Safe.exe'.
Why 'Safe'..? No clue, doubt it matters.
## They don't have a 'latest' link, so just download it manually:
## https://assettocorsa.club/content-manager.html
unzip ~/Downloads/Content\ Manager*.zip -d ~/Downloads
cp ~/Downloads/Content\ Manager.exe ~/.local/share/Steam/steamapps/common/assettocorsa/Content\ Manager\ Safe.exe
Optional cleanup:
rm ~/Downloads/{'Content Manager'*.{zip,exe},'ReadMe.txt'}
Create a Steam config directory in the game's Wine prefix and link the loginusers.vdf file from our host system to it
mkdir -p ~/.steam/steam/steamapps/compatdata/244210/pfx/drive_c/Program\ Files\ \(x86\)/Steam/config
ln -s ~/.steam/steam/config/loginusers.vdf ~/.steam/steam/steamapps/compatdata/244210/pfx/drive_c/Program\ Files\ \(x86\)/Steam/config/loginusers.vdf
Launch Steam again, and change the Proton compatibility version to 6.3-8
And then set the following game launch parameters: (do not run this command, it does not work standalone)
~/.steam/steam/steamapps/common/'Proton 6.3'/proton waitforexitandrun ~/.local/share/Steam/steamapps/common/assettocorsa/'Content Manager Safe.exe'; echo %command%
At this point, you can try to launch the game a few times while changing the Proton version and trying to install .NET if you weren't successful the first time
Now launch the game via Steam - this should open the Content Manager setup screen where you'll have to set the Assetto Corsa root folder to the following:
Z:\home\<USER>\.local\share\steam\steamapps\common\assettocorsa
ex.: Z:\home\niraami\.local\share\steam\steamapps\common\assettocorsa
Configure the rest of the CM options as you would normally.
It is quite possible that a window asking you to view or ignore some errors will appear, choose any option. AC Content Manager should launch after that.
If it still doesn't not launch (while throwing a dxvk::DxvkError error - which can be seen if Steam is launched from a terminal), and you're using Nvidia, then check if you've got amdvlk installed (for some reason) and remove it
# Check
pacman -Qs vulkan
# Remove
pacman -Rns lib32-amdvlk