ThoRn: I guess all we can do is leave bad reviews on GOG store page to warn others to buy this one on Steam since the developers have abandoned it here.
EDIT - Just left a 1-star review on GOG. I hated doing it but this is angering me so much. And the real laugh is that the game is selling for CHEAPER right now over on Steam. They get a 23% off discount so that it's $19.24 for them but here on GOG it's only a 15% off discount so it's $21.24 for an inferior version of the game that hasn't been updated and without the option to buy the latest "Demons of the Past" DLC. What a joke!
I don't believe in down voting something right away, but if it will take another month I'll add a bad review and warn people not to buy it here because like with so many games there is a lack of support when it comes to the release of DLC or updates.
Also want to add real quick, It isn't always the developer's fault when it comes to GOG, seeing as GoG itself seems very lackluster during this holiday and barely anything of value was released or let alone any new games for that matter.