+1. Depth test is broken for me too. GPU: Intel
Seems to be recent wine bug (3.x)
reports in winehq from previous versions says opengl support is ok
OpenGL mode seems to work correctly on Nvidia. It might be a Mesa bug.
/gap_iDepthBits=24
/ApplyVideoMode()
in console to fix issue
proton 3.7x1 2018-08
Depth test does not work. Seems to be a bug somewhere in wgl/glx translation layer. Check if depth buffer size translated correctly
SeriousEditor has the same issue
In D3D mode game does not draw anything with such errors:
https://github.com/ValveSoftware/wine/blob/proton_3.7/dlls/opengl32/wgl.c
vega 11, amdgpu
glxinfo:
https://pastebin.com/LpjkiwyD