Game runs fine via Wine and Proton 8.0/experimental on Fedora 38 (KDE spin), using Nvidia proprietary driver (GPU RTX A2000, version 545.29.06) and running via Xorg (I haven't tried Wayland).
This could be a driver issue. Plus game is running on Godot 4, which uses Vulkan by default and many older GPU don't have Vulcan support.
I can think of 2 possible solutions:
- Run game with command line argument --rendering-driver opengl3 . It forces Godot to use OpenGL3 renderer (I used it on Win 10 on a computer with an old GPU and it works). If you're launching the game via Steam, just add this argument to the Launch options.
- Update drivers - this only helps with new cards.