There seems to be an issue with the trigger for the achievement "I Never Left Your Side".
The option to "wait forever" appears on two occasions (upon delivering the 1st and 3rd vessel), and selecting it will close the application and dump the player back to the desktop as intended, but the achievement is never triggered upon reopening the game.

Since supposedly 7.5% of the GOG players have it I assume there is SOME way to trigger it, most likely depending on the vessel brought in, but I feel that this is more likely a bug.
The steam version has the achievement at a whopping 55%.

Hello, and thanks for the quick reply.

First of all, let me thank you for creating the game in the first place (it's probably the most thought-provoking title I played this year) and putting in the extra effort with the GOG version.

Now, with the casual flattery out of the way: I do have all the other achievements and am currently stuck at 96/97. Due to the sheer number of them, it took me a while to isolate the culprit.

There has been another iteration of this issue reported on reddit, again with the GOG version.
https://www.reddit.com/r/slaytheprincess/comments/17ikuau/minor_issue_i_never_left_your_side_achievement/

Since the achievement has been obtained, I assume it's an issue with the trigger not firing under certain conditions, but I'm at a loss. Maybe someone who has the achievement can weight in on this.

The other achievements triggered without much of an issue.

Same, and same issue with "A new and unending dawn", which makes me think it could be caused by the fact that both these achievements are linked to the game "ending"/closing...?

Alternate thought for a possible explanation: for the first day or so of my playing, I indeed had the issue of GOG saying I had 0 achievements. IIRC, I did see them getting triggered while playing, and maybe they even showed in the GOG list, it just counted 0? Anyway, after a while, that fixed itself, but it seems it only retroactively collected some of my achievements, and I did have to redo some routes in order to re-get others (with the game correctly skipping previously-seen text, so I know for sure I had indeed met the requirements and something in the game did remember that).
For both of these stuck achievements (I Never Left and Unending Dawn), I had met the requirements very early when first starting to play. Could it be a matter of the game having marked me down as having those achievements and not re-triggering them for GOG to take it into account...?

At any rate, I've got all other achievements aside from these 2, had a fantastic time hunting for it all, and STILL discovered some new lines and situations while just trying to re-trigger these last two for a third time. Gorgeous game, I love the princess so much.

(ftr I'm on Windows)