I played 30 hours in offline mode and decided to re-download the game and play the client version in order to unlock the achievements. I found that my save doesn't automatically unlock achievements made on GOG but that's not a problem. A few hours ago I unlocked a achievements that is displayed on GOG but that shows as a percentage of general completion 0% and it says "this game does not support achievements" :/ It is this a general bug or mine?