Very strange:
GOG Galaxy 2.0 offered me to claim the PC-version of "The Witcher 3" because it found a console version of "The Witcher 3" in my connected PS/Xbox accounts.
But I don't have that game on any console, neither as retail or digital and it wasn't a PS+ or GWG title either.

It is only in Xbox GamePass (where my subscription ends next month) and PSNow (where I don't have a subscription).
So maybe a trial GamePass or PSNow subscription is good enough to claim the PC version for keeps.









