I initially tried using GOG forum but they didn't respond. I then got through to them on the Steam forums. They didn't seem to have a fix for the issue but they suggested that I could reset my progress to try the trigger for the achievement again by deleting my local progress file. I tried that and it still didn't work (the file gets remade the moment you launch the game)

It's probably due to the Galaxy cloud saves. Disable them in the settings and try again to see if anything changes.

Any news for Ys I & II Chronicles+. I manage to unlock all the achivements for Ys I except for one that unlock after unlocking every achivements "Esteria, We Hardly Knew Ye ". It is at 0.0% . Did some one ever manage to unlock it?

No, they're completely broken. It seems that XSEED has only one person handling achievements on GOG, KawaiiSara, and she has also posted here on GOG a few times, but so far she hasn't responded to any of the various reports for this specific bug.

You can try contacting her here on GOG, or go to the official XSEED Discord and try there. Maybe one day these bugs will be fixed.

https://discord.gg/xseedgames

Yakuza Kiwami 2. The last achievement "Kiwami 2" should unlock up on getting all other achievements. I just got the last of the other achievements but this one did not unlock. From what I read, sounds like this one is bugged.

Already on the list, but it's always useful to have additional confirmation, thank you!

I hope it gets fixed somehow, but GOG would have to intervene, contacting SEGA or Ryu Ga Gotoku seems rather problematic.

Does anyone know if Rise of the Tomb Raider has invisible achievements by any chance, or did they really launch it without achievements?

No achievements, they might have used the Epic version of the game.

Just like Batman Arkham Knight

Indeed, the achievements are missing, and it has been discovered that GOG also forgot to include the files for other languages, both in Rise and Shadow.

I have opened a thread in the Tomb Raider sub-forum to request the implementation of the achievements. If you are interested, please post even just a +1 so we can try to apply some pressure:
https://www.gog.com/forum/tomb_raider_series/achievements_missing_for_rise_of_the_tomb_raider_20_year_celebration

Great news, achievements are coming soon (already visible on Galaxy now, but not yet operational):
https://www.gog.com/forum/tomb_raider_series/achievement_support_languages_for_rise_tomb_are_on_their_way

Hail of Glass from Thief: Definitive Edition seems to be broken. I'd done it multiple times, and it never unlocked.

This game doesn't seem to have galaxy cloud saves, I'm looking at the configurations and the Cloud Saves option is unchecked and greyed out

Mmm... Try starting the game with Galaxy, delete the save, and only then close the game.
If that doesn't work either, there's a redundant backup somewhere.

I joined the game's Discord server and noticed a user with the same problem as you. Is that you? If not, the developer seems to have analyzed the player's log, but then didn't write back to say whether they found a solution.

It appears that the achievements added to Rise of the Tomb Raider have some issues, there are quite a few "Legendary" ones that should have way bigger completion percentage, like Craftswoman or Dead Ringer.
Can someone confirm that they actually unlocked some of the non-percentage legendaries?

Edit 17/10 - it appears that the global percentages are once again not working, at least for Rise, they have not changed for at least two weeks now.