Kobi-K: Did you try extracting the DX11 wrapper to the game's 'system' folder and running the game from GOG's Link?
What? I don't know what "running the game from GOG's Link" means? Sorry.
And I'm not seeing any DX11 wrapper. Did my download not work properly? I'll download it again and try again.
Thanks for responding, sorry I didn't see it until now. Installing this game back when I posted this resulted in screwing up my other Gothic games. Neither Gothic 1, nor Gothic 2, would run after I installed this, when I had previously been playing both for months. I went from Gothic 1 to Gothic 2, was almost finished with Gothic 2 (I had killed all the dragons but the last one) and that's when I downloaded this game and installed it thinking I wanted to give it a look since I was thinking of this game after Gothic 2.
When it screwed up my ability to play either Gothic 1 or 2, and wanting to complete 2, I tried a system restore to a point prior to installing Archolos. This resulted in a fatal error of some sort where my computer would no longer boot and my only option was a complete reinstall of Windows. That's right, had 1 dragon left to complete Gothic 2 and then lost it all.
I have since reinstalled and replayed Gothic 2, finished it all the way this time (funny little conversation at the end of the credits that I had somehow missed the previous times I beat the game, probably because I didn't wait for all the credits to roll. Just mentioning that for anyone reading, there's some funny lines at the end of the credits at the end of the game between you, Diego, and I think the other voice was Gorn but not sure).
Anyway, so now I want to try Archolos. But I'm not finding any setup guides to help, and, as stated in the OP, this wouldn't run last time I installed it but will try again right now. It would be nice to know if one has to add the stuff like playerkit or systempack or union or whatever like I did with 1 and 2, but since this is a 2021 game I thought it would be fine but guess not and I'm not finding any info on what to do to get this to run.