What I see in the GOG Galaxy stats, apparently nobody is getting this achievement and neither is it triggering for me, even though I completed (several times) the game on the highest difficulties.

Good to know. I didn't unlock the one for defeating SHODAN either, so I figured I might get it on my hard mode run. But if that one's bugged too, I'll have to keep a save right before the final fight, just in case.

Weird, it works.

Today I started new game 3 3 3 3, played for around 10 mins, loaded my save before last Cyberspace (Shodan) and received achievement "Salt the Fries" but not "It's Over" ;O

I think I might've deleted mine! Drat.

I'll have to give this a try if I play through it again. *sob*.

I can confirm that this method works. However, there is no need to play for 5-10 minutes. Just start a new game (with maximum difficulty), skip the intro video, and load your save while you're still in your appartment. There is no need to reach the Citadel.

Now I have Don't Forget To Salt The Fries, but I'm still missing It's Over.

I don't have a save from my 3-3-3-3 runs, so I decided to give this a try with my 2-2-2-2 Bridge save.

Can confirm it works. The important bit seems to be that the new game has to be 3-3-3-3.

I started a 3-3-3-3 game, skipped the intro like you said, loaded my 2-2-2-2 Bridge save from the apartment, beat SHODAN, and Fries unlocked.

So you can theoretically unlock this regardless of what the difficulty of your Bridge save is.