So a little drama when this thing released. While preorders were up the system requirements listed Windows XP as supported. At some point that changed but of course its not like they sent out emails to alert people so imagine my surprise when I install the game and it doesn't run. I sent an email to GOG support and its true, XP isn't supported. They offered me a "one-time refind" for my "old purchase" (it was a preorder and they listed the wrong requirements, don't pull that shit with me). I decided to hold onto it because I could extract the music from the game files and I should upgrade soon-ish anyway.
HOWEVER!
Turns out I don't have to wait because someone on the Steam forums
made a patch that lets the game run on XP. This raises all sorts of questions such as why it couldn't be like this in the first place, but hey! It works! So I can play it and I'm happy.