So I applied the GoG update that makes achievements work. I was already in the middle of the last level when the update was released, so I unlocked 3 achievements from beating the game. I can see those 3 achievements in Galaxy, but how do I view all possible achievements for the game? It's only showing me the 3 I unlocked and nothing more.

edit: Typo in thread title, I know, but looks like I can't edit it.

Of the games I own on GOG, I can safely say achievements work fine on Deponia, Dead Synchronicity, Rebel Galaxy and Worms World Party Reloaded.

Is GOG in charge of achievement issues or is the devs? Because I think the "Treasure Hunter" achievement in this case might be bugged.

I'm thinking this as well. If someone completes it exactly as the achievements states - then why would it be locked for that person.

I finished the game lately and there were no more problems with the achievements. I guess our voices were heard