Add the installer as a non-Steam game and run it using Proton.
If the game fails to start or says files are missing, try moving the installation to your main C: drive rather than an external drive, as some versions have issues with symlinks or external paths. assassinscreedoriginsuplayripfisher install
Many "RIP" versions or repacks (like those from FitGirl) allow you to skip downloading voiceover packs you don't need to save space. Add the installer as a non-Steam game and
