I've finished the game last Sunday. So I don't bother anymore. The game was fantastic, but this flaws the experience a bit.

I've also found another bug. The game doesn't delete old autosaves. In my case it got to the point of over 200 MB of save files and so the synchronisation to the cloud save service of GOG doesn't work anymore. I get the error message that I have to delete old save files. But even when I do so, it loads them back from the cloud backup when I start the game again. So I disabled cloud saving.

Same... Wtf gog

Looking at the list of ungettable achievements, it appears that a couple at the very end are regarding Infiltrator Mode. Maybe this happened after you made your post... though if so, that means they updated the game without bothering to fix this issue. Did you ever hear back from the devs?

Yeah, the infiltrator mode achievements have been added some time after i wrote my post. Unfortunately the game hasn't been updated to make the achievements work.

I got an answer from the publisher: After that i've contacted Teyon but never got any reply. :(

The game got an update today, I completed the first mission again and got the achievement for it, it seems they fixed it, and added the missing achievements for the "infiltrator" dlc.

Better late than never.

Some say it's fixed yet, but here I am in 2023, with the same exact issue. I have lock picked more than 10 locks and found more than 10 notes. No achievements for either of them. The other achievements appear to be working... for now.

It seems that several achievements are broken, specifically those that require multiple actions.
Easy Money - Successfully open 10 locks.
Hacker - Successfully hack 10 devices.
Historian - Find 10 notes.
Priority to Me! - Complete 5 side objectives.

Everything else that requires a single action appears to be working fine.

You'll have to ask support to unlock those for you, I'm afraid.

I tried downgrading to several older versions via Galaxy, but that didn't seem to help.