PROTON_USE_WINED3D11=1 %command%
Proton Experimental will make the game enabled to launch.
Sometimes the game is lagging till it has done its "in-game buffering".
All in all, the game will hopefully run and with in-game tweaking you will have 60 FPS and smooth gameplay!
Using Proton Experimental makes you enabled to load the game.
Using HDD and not SSD will make the game slow loading.
The overall gameplay is surprisingly good, and with a few tweaks in-game you will be running the game in 60 FPS and being very responsive.
PROTON_USE_WINED3D11=1 %command%
Could not launch default. Switched to Expiremental and used launch options
Playable with some small flaws
Many stutters during the first few minutes, but it peters out after a while
Now, upon release date, it seems playable. Needs some time to 'warm up' and has a few missing ground textures here and there, but so far no real bummers
Fails to run post-installation routine
When starting the game an error window occurs: "Installation failed, please re-run installer as normal user, not Administrator"; then exits