No joy here. Logs attached - looks like a graphics issue with my once-powerful but decidedly ancient graphics card.
Hello @KGOrphanides, your Terascale 3 video card does not support vulkan, so your best bet is to add PROTON_USE_WINED3D=1 %command% or try some of the -force-renderer options from https://docs.unity3d.com/530/Documentation/Manual/CommandLineArguments.html.
Thank you. Can confirm the game is now working.
proton 3.7-3x1 2018-08PROTON_USE_WINED3D=1x1 2019-01PROTON_USE_WINED3D=1 %command%x1 2019-01
Tried with Proton 3.7-3.
The game worked flawlessy.
My specs: https://gist.github.com/ziabice/8c19008e58f82b16a62f7ab65ba235d4