On Kubuntu 20.04, the game works following those howto from Ragnaman: https://steamcommunity.com/app/345240/discussions/0/3814032755151257565/
in my case Proton 6.3.8, including movies/cut-scenes also works.
Sometimes game crashes for no obvious reason (maybe Steam Overlay), not yet tried to add LD_PRELOAD="" %command% or PROTON_USE_WINED3D=1 %command% options.
@GumboCode @krzyklo the game is working on my end with proton experimental without extra changes, videos load as well and the game hasn't crashed for me. However, I've noticed there's a chance the game will hang when alt tabbing (though, I haven't gotten it to happen at native res)
proton experimentalx2 2026-02proton 6.3x1 2026-02PROTON_USE_WINED3D=1x2 2026-02LD_PRELOAD="" %command%x2 2026-02PROTON_USE_WINED3D=1 %command%x2 2026-02
Compatibility Report
System Information
I confirm:
steam-345240.log
Symptoms
This might be due to the Steam overlay, adding
LD_PRELOAD="" %command%in the launch options stops the crashing.The only real fix for it is to put
PROTON_USE_WINED3D=1 %command%in the launch options, and switch to Proton GE. The WineD3D renderer runs really slow at high resolutions for me, so I keep the resolution at "800 X 600" for both "Strategic Map Resolution" and "Battlemap Resolution."Reproduction