Some users say that the game had achievements but that the developers have removed them.

Enjoying the game you purchased should be the only achievement you'll ever need.

I have not bought it yet

The game has no achievements in gog and the developers are ignoring gog users as I read on another forum.

Game that I discard.

disagree

The user zeffyr talked with the devs an they told him that "the achievements are coming to GOG and they should be implemented soon, probably in few days time".

I will buy the game when they add them

Hello, right now King of Seas has the Galaxy achievements, but they are invisible (you can't see the list of them, but you can see the ones you have unlocked) and 5 of them are irretrievably broken. GOG support should be able to manually unlock the broken achievements upon request.
You can refer to the list in the OP of this thread for the details:
https://www.gog.com/forum/general/list_of_broken_gog_achievements/post1

I caught it on when it on a free promo, it's ok, but there are problems with reloading your saved games, so it's not really functional right now. Someone did post up a fix though, but I didn't try it out, got a big backlog to work through, need to dedicate my time to that! :D

Definately not worth buying at it's full asking price IMO.