I ask to the developers and the GOG team, if please you can add the achievements, now that many games that did not have them are adding them retroactively and that GOG Galaxy is becoming more and more performing. It would be a nice incentive to replay this wonderful video game. Thank you for your attention!
Actually this game had listed the Galaxy achievements when it was released. I contacted the publisher as well as GOG and the publisher unfortunately told me that this was a mistake by GOG and that their achievements are not compatible with the way Galaxy does its achievements. Adding achievements on GOG was not planned by the devs (06/2017). Maybe they've changed their mind but I highly doubt it.
Here is exactly what they (aspyr) said:
"Achievements have never been supported in the GOG version of the game.
GOG has it's own entitlement system (Galaxy) that does not work with the game.
This feature has never been supported in the GOG version of the game.
If GOG is advertising achievements as a feature of this title, they need to change that."
"To follow up:
I do not see anything scheduled to indicate we will be patching the game any time soon."
"Sorry for the confusion.
From what I understand of the issue, we had said we would be open to working on achievements in the future, but they have never been implemented.
I will talk with our sales team to make sure GOG follows up in making sure that they make sure to avoid selling the game with the promise of Galaxy achievements."