I have been hoping for years that GOG would get this game, but so far no luck.:)
It’s strange that they don’t have it on GOG, since they have Black Mirror II and III (the only other games from Cranberry).
I also prefer to buy games from GOG. No DRM or additional software that has to run in the background, just like it should be. I couldn’t care less about Steam achievements (although I kind of understand people who ”collect” them).