“Weve recently finished celebrating the fifth anniversary of The Witcher 3: Wild Hunt and yet heres another good reason to be a fan of this cult game from CD PROJEKT RED. So if you already own the game on any PC or console platform, you can claim the GOG.COM copy for free with GOG GALAXY 2.0.” – GOG and CD PROJEKT RED
Source: N4G PC Gamers can now claim a free copy of The Witcher 3: Wild Hunt via GOG GALAXY 2.0