Hello! Been playing Oath in Felghana via GOG Galaxy and achievements don't seem to be popping when they should. The achievements list is visible in Galaxy, but they don't appear to be triggering. Are they not fully implemented yet, or is there something peculiar I need to do?

It's possible that they haven't been implemented yet. The games originally did not launch with achievements, and the game card does not have them advertised yet. Even though all the Ys games on Steam have achievements, right now only Oath in Felghana and Origin show achievement lists. XSEED did retroactively add achievements to Trails in the Sky FC, and when they did, there was a patch notification. I think when the patch goes through, possibly later this week, then the achievements will be active.

Let's hope for it... and thanks for heads up, I didn't notice. :D

I thought that might be the case. Thanks! I'll leave this topic open until we see one way or the other.

It is similar with Ys Origin. Achievements are added, they show on game card in Galaxy, but does not seems to work in game. I bought first blessing and still have no achievement unlocked, though I should get Minimally Exceptional.