More like lack of proper separation of testing data :-P
It's a joke? Has it always been there... don't remember seeing it before now?
I didn't think I would need to explain so:
In short terms,what is right at Gog?Something like this is normal for them.
I hope you've got it now.:-)
You know now that I think about I do think I remember seeing this before in early alpha, but I don't remember it showing up in Vista (which I upgraded from). Maybe it's showing in Windows 10 then because it's not actually supported yet. Lol.
I just forgot about it honestly. This must be left from testing the achievements system then. xD