Hello @EddieMattos, starting with Proton 5.13 and newer, Proton is run inside the Steam Linux Runtime - Soldier container environment. In order to use this with Flatpak, the system install of Flatpak needs to be able to support sub-sandboxing and a couple other technical details which makes Flatpak 1.10.2 too old be used with Proton (https://github.com/ValveSoftware/steam-runtime/blob/master/doc/steamlinuxruntime-known-issues.md#flatpak).
Please either update Flatpak on your system or install Steam outside of it and retest.
Thanks @kisak-valve , I updated the Gist and I'm using Proton 6.3-8. Now I get the error message: "Game isn't properly installed. Please reinstal program." I also have the log:
steam-1930.log
The game is working under Proton 63-8, but without sound and with the graphic glitches of flashing colors in the distant land and at night.
Distant_land
Night
Night_1
proton 6.3-8x1 2021-12proton 5.13x1 2021-12proton 5.0-10x1 2021-12
Compatibility Report
System Information
I confirm:
[x] that I haven't found an existing compatibility report for this game.
[x] that I have checked whether there are updates for my system available.
Symptoms
The game is loading only under Proton 5.0-10 without sound and there are graphic glitches that may be related to the shader.
The native version doesn't run.
Couldn't generate the log for some reason.
The solution sugested in ProtonDB doesn't run in my machine.
Reproduction
Run the game.