Below are instructions for using a proton runner directly, not inside Lutris or Bottles. Bottles appears to work the same way, but the instructions will be quite different. For example Bottles runners with the flatpak are in $HOME/.var/app/com.usebottles.bottles/data/bottles/runners and many other paths and dxvk packages differ.
- Obtain a copy of Proton-6.1-GE-2 from here https://github.com/GloriousEggroll/proton-ge-custom/releases/tag/6.1-GE-2
- Obtain a copy of GE-Proton8-25 from here https://github.com/GloriousEggroll/proton-ge-custom/releases/tag/GE-Proton8-25
- This is the version I tested, probably not the latest version that will work.
- Turns out VKd3d was split out into a separate package. Game/Launcher starts after GE-Proton7-35. As far as I was able to test RSF will require being run in vulkan mode in versions after this but I didn't extensively test this.
- Extract 6.1 to somewhere temporary, we only need to grab a couple of files out of it
- Extract 8-25 to somewhere persisten