I've installed the game without any issues, relatively comfortable in the terminal thanks to being very poor in high school. It has been a long while since I've been on a linux machine now, but it's the one I have and I mostly do work so having some cool, low powered games helps out (machine is from 2015).

My issue is with the DLC installation. Whenever I try to install the DLC (alt costumes, expansion pack) i get a fatal error detailing 'directory creation failed' and I just can't seem to figure out what's going on. Anyone else run into this issue or have some ideas on how to fix this?

I am using an Ubuntu fork for simplicity sake, based off 18.04 with some minor improvements. Will add information if it helps.

How did you install the base game. If it was as root then that's your problem. Never install GOG games as root. If you did then delete the install, as root user, and reinstall with your normal user. Then try the DLC installer. Otherwise, what's the actual commands you ran?

I installed the game after chmod +x on the game.

chmod +x gog_celestian_tales_old_north_2.3.0.4
./gog_celestian_tales_old_north_2.3.0.4

This ran the installer. Once completed, I then did the same to the DLC, which launched the installer and then the error happened.

EDIT: I did install this to a micro sd card, I wasn't able to install to the default location for some reason (received the same fatal error as I do with the DLC).

I decided to uninstall the game and try to unzip instead of installing the game with the installer. This seems to have solved the issue, though it has quite a few drawbacks that I am still working on. I did this by opening the terminal in the directory I wanted the files installed in (I also put the .sh files there) and I ran the following commands:

unzip gog_celestian_tales_old_north_2*
unzip gog_celestian_tales_old_north_a*
unzip gog_celestian_tales_old_north_h*

While unzipping the DLC the terminal requests to overwrite files that do not seem to exist. I used the
A
to tell it to do whatever the heck it wants. This allowed it to do it's thing and seems to have resolved my issue. As I said, further testing is needed and I still haven't sorted the issue with the installer script.

I will update this when I have more information, outside help will still be appreciated if it gets me to a solution with the installer.

UPDATE: Manually setup desktop icon, startup menu icon, and related commands to launch the game as if installed with the installer. i do not know what the game is supposed to look like, so I can only assume I've done this right. When I launch the game, I can see the Ravenger expansion and launch it. I can also change the default costume but right now it appears that it is only the one alt. costume, a winter costume. Insight appreciated, more testing to follow.

UPDATE 2: This ultimately fixes the issue, however it does so ONLY if you unzip the base installation. If using the installer and then unzip the DLC the game will not recognize the DLC. It also always seems to show v1.0.0 which is probably something to do more with the developers and the linux build than an actual issue. Considering this resolved based on this fix, however I am still open to installer assistance if someone has an idea.