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It runs after adding -dx11 as an argument in terminal, but it's unplayable at about 6 or 7 fps. Any ideas?
The game devs. are working on fixes for the game, which is using the Unreal Engine 4. Xbox, Playstation and PC have a few bugs. I would wait for the first patch. What kind of hardware specs. do you use ?
An Nvidia 1660ti GPU, i7 7700k CPU, and 16 GB of RAM. I ended up booting to Windows and it works flawlessly for me, but it'd be nice to have it running on Linux.

I'm going to see if I can find a way to make Steam Proton work with it, and if I can and it's better, I'll post how I did it.