Hey there, I just buy this game and it's georgous ! I only have a really bad fps issue with it..
My system:
- i7-7700HQ
- 16go Ram
- nvidia 1070 max-q
- screen resolution: 1920*1080

And I experiment fps slow down, going under 20fps that seems to appear randomly. But once it start, it come back more and more..

I don't know what I should do here.. I tried with every graphics settings, nothing really change..
Is it a know issue ? I can send you a log file or something if the game have any ?

It also runs incredibly slow on my 8GB SSD Mac; and trying to install it offline outside of the GOG Player doesn't work either.
I hope the developers still read this forum, and I'm hoping for a fix.