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Didn't find anything to answer this question yet.
Are there Achievements for Papers, Please! in the GoG Galaxy?
If yes, are they working correctly?
Papers, Please, as of today, features no GOG Galaxy achievements. For illustrating purposes, I'm attaching two images, one of Papers, Please and another one of a game with Galaxy-enabled achievements.

Happy gaming!
Thanks for the answer!
Pity no achievements yet, hope they will add them soon.