I am having a problem getting the Thrillseeker achievement to unlock in GOG. The game says I have completed it as it appears unlocked in the in-game achievement list. I never got the notification from GOG that I earned it and it doesn't show in the list either. I've had problems with other achievements, but they usually pop after some delay or loading my save game again. Those methods aren't working with this achievement.

I am still having achievement issues witht this game. Since my first post, I have earned two more achievements in game, but not in GOG. They are Lab Assistant and Amusmineer. Thrillseeker has still not been earned in GOG.