1) Install Arcanum
2) Use compatability settings in steam to use Proton (I used Proton version 8 when writing the guide)

Try running Arcanum before applying any mods, it should just work, but its performance might be horrible (lags in main menu so bad its unusable). This is OK, this means we can proceed with next step. Close Arcanum process and we can proceed.

3) Download UAP (Unofficial Arcanum Patch), web search for "terra-arcanum UAP" you should be able to find it.
- high resolution mod is part of UAP
- I was using UAP version 2.0.2 at the time of writing the guide

You will need to know how to use a tool called wine, but if you are using steam and proton, very likely that you already have wine installed.

1) Use steam and "Browse local files" to find Arcanum files. We will need to give path to the correct location of Arcanum to the UAP installer when using wine.
Example of my path to Arcanum:
"/home/user/.steam/debian-installation/steamapps/common/Arcanum/Arcanum/"
(we will have to reverse forward slashes to backward slashes and pay attention, Arcanum is in path twice for a reason)

2) go to where you downloaded UAP executable
3) open terminal at that location
4) run UAP with wine: wine UAP2.0.2.exe

5) Now the tricky part, tricking the installer (which is designed for windows) to find the Arcanum files.
Hit browse and navigate through the file structure to find approximate location of where your steam is with all the installed games. Reason why we do this is that the installer cant see hidden folders (those that start with a dot). We will paste the full path manually, the path we found at the start of this guide section.

Example of my full path that I manually pasted for installer to find the correct location:
"Z:\home\user\.steam\debian-installation\steamapps\common\Arcanum\Arcanum"
(notice the backwards slashes, this is important)




Hit "Next" and you should get a successful install of the mod.


Congrats, the mod is installed and you can play, and the game runs in 720p thanks to the high resolution patch that comes with UAP.