...

A common installation issue especially on Linux when having purchased the game through GOG is a missing Vulkan runtime. Details how to solve this can be found here.

A second issue you might experience is related to a missing (or incompatible) OpenSSL library on your system. Again, this only applies to Linux and only when having installed the game through GOG as the Steam runtime ships with a compatible version. We are working on changing this dependency in a following patch to remove this problem for good. Please refer to this troubleshooting page for an workaround.

Exitcodes

When you try to start the game, it performs some early startup checks and if it determines some setup issues, will provide you with an popup like the following one which provides you with instructions on how to resolve the startup problem yourself:

...