Thank you, I had been wondering for some time if GOG also suffered from this problem.

Since it's not a bug in the true sense of the word, I'll put it in the "Helpful hints" section. Of course it's shameful that Warner Bros. does absolutely nothing to make up for the problem. GOG may have more and more problems like this, as games tend to be live services.

For your information:

The Dream Machine recently got an update which added achievements (both ingame and Galaxy). Ingame achievements did not show any text but we have found a workaround here. Galaxy achievements can't be unlocked right now. I've contacted the devs using the Steam forum and got a reply within less than a minute. They will check and hopefully fix this.

Thank you, I had noticed these updates and I thought they were still working on it, hopefully they will also add icons to the achievements on Galaxy, for now they are empty.

Apparently they are not going to fix this achievement issue... on Epic Games Store? I didn't know Epic even has achievements. (Game was Bear With Me.)

Just got this email a couple of hours ago:

Hi (my email address),

Unfortunately it looks like we do not have the dev resources to address this issue at this point. If you are interested in the Steam version of the game, please find a code for you to redeem:

(STEAM-KEY-HERE)
​
Apologies again for the dev limitations on the Epic Game Store version of the game.
​
Sincerely,

Modus Support
(redacted)@modusgames.com

Interesting, it took them weeks to respond and they didn't understand anything. XD
Anyway they don't seem willing to fix the bug, have you tried to answer them that the bug is on GOG and not on Epic Store?

Yes. Wanted to make sure they mean GOG. I think Epic is just now getting achievements or something, and of course that would require them to code it all again. Completely understandable if they don't have the manpower to do that. Fixing one achievement that has already been implemented is not comparable.

I am guessing some Chinese whispers happened here. Someone from Modus contacted Exordium and asked:

"Hey, did you know there's platforms other than Steam, right?"
"Vaguely, yeah. Do you mean Epic? That's the only non-Steam I can think of."
"Probably, yeah. Anyway, this guy says something about he needs achievements in not Steam?"
"Epic doesn't have... ugh... we would need to code them from scratch... no, that's not gonna happen. I'm in the middle of getting a vicroy in Fortnite, go away."

I agree, that's absolutely what happened. XD

Feels a bit like the attachment.

Ahahah exactly!

SERVICE NOTICE: Since there is no more room here on the forum, I'm in the process of importing all the listed games into the spreadsheet once and for all. This will allow me to focus on a single list that will be easier to navigate, and I'll dedicate the main post to the description of the most frequent types of bugs on GOG.

Two people report broken achievements in The Outer Worlds DLC: https://www.gog.com/forum/the_outer_worlds/dlc_achievements_bugged

Thank you, I wasn't aware of this, I will look into it as soon as I can.

And reports of achievement problems in Sleeping Dogs, though it's unclear whether the same achievements are breaking for everyone: https://www.gog.com/forum/sleeping_dogs_definitive_edition/achievements_not_unlocking

I was able to unlock everything in The Walking Dead: The Final Season except for the "Bonded" achievement. Tried several times to be just friendly to Louis in the scene and according to videos that's how the achoievement should unlock which unfortunately it did not for me.

Thanks, I have no idea what's going on with Sleeping Dogs, the achievement percentages indicate that they can be unlocked, yet there are those who can't unlock even one, I'll keep an eye on that.
Thanks, the very low percentage of users who have unlocked it unfortunately suggests that it just doesn't work.