в версии 0.8.7 фпс был на мксимальных настройках 70-100, а в последней аерсии стал 20 !!!!!!!!!

in the last version i test -- (0.8.7) -- i have 70-100 fps (1440p, ultra settings).... but in 8.9.1 i have 20 !!!!!!

this is very bad... i'm not normaly funny with you game :( this is BAD!

P.S. In the 1440p@LOW settings i have 24fps!!!! what happend with this COOL game????

if you need some diagnostic -- i send it to you

P.P.S. Also in main menu 25 fps :-O

I fix this issue with new NVIDIA driver (ver 391.01).

Now i have black screen after ~40-80min in game... Alt+F4 and restart fix this.

In the output_log.txt spam about d3d11 allocation error

this is:
d3d11: failed to create staging 2D texture w=128 h=2 d3dfmt=10 [887a0005]
d3d11: failed to create staging 2D texture w=128 h=2 d3dfmt=10 [887a0005]
d3d11: failed to create staging 2D texture w=128 h=2 d3dfmt=10 [887a0005]
d3d11: failed to create staging 2D texture w=128 h=2 d3dfmt=10 [887a0005]
d3d11: failed to create staging 2D texture w=128 h=2 d3dfmt=10 [887a0005]
d3d11: failed to create staging 2D texture w=128 h=2 d3dfmt=10 [887a0005]
d3d11: failed to create vertex buffer of size 159360 [0x887A0005]
d3d11: failed to create index buffer of size 7968 [0x887A0005]
d3d11: attempt to lock null vertex buffer
d3d11: attempt to lock null index buffer
d3d11: attempt to lock null vertex buffer
d3d11: attempt to lock null index buffer
d3d11: attempt to lock null vertex buffer
d3d11: attempt to lock null index buffer
d3d11: attempt to lock null vertex buffer
d3d11: attempt to lock null index buffer
d3d11: attempt to lock null vertex buffer
d3d11: attempt to lock null index buffer
d3d11: attempt to lock null vertex buffer
d3d11: attempt to lock null index buffer
d3d11: attempt to lock null vertex buffer
d3d11: attempt to lock null index buffer

and this

D3D11: Failed to create RenderTexture (160 x 90 fmt 44 aa 1), error 0x887a0005
(Filename: Line: 344)
D3D11: Failed to create RenderTexture (160 x 90 fmt 27 aa 1), error 0x887a0005
(Filename: Line: 344)
D3D11: Failed to create RenderTexture (160 x 90 fmt 27 aa 1), error 0x887a0005
(Filename: Line: 344)

d3d11: failed to create index buffer of size 20604 [0x887A0005]
d3d11: attempt to lock null vertex buffer
d3d11: attempt to lock null index buffer
d3d11: failed to create vertex buffer of size 611880 [0x887A0005]
d3d11: failed to create index buffer of size 20544 [0x887A0005]
d3d11: attempt to lock null vertex buffer
d3d11: attempt to lock null index buffer
GameDataBuilder.Unload

Maybe check the temps of your videocard.
My 1060 is running constantly at 95-100% GPU load with this game.
Yours might be overheating and then drops out the game with random errors.
Mine does not.
My longest gameplay session was ~ 7 hrs.

I recommend MSI Afterburner for logging temps in the background.

No, my system not overclocked and temp of my 1080 is ~60deg