Install protontricks for for further installation of sneaky upgrade

Other manuals didn’t work for me, so I’ll write how I set up the sneaky upgrade setup

1. go to desktop mode
2. open discover
3. type protontricks and install it
4. download sneaky upgrade full herehttps://www.moddb.com/mods/thief-3-sneaky-upgrade/downloads/sneaky-upgrade-fat-edition
5. put downloaded file into your game folder (where t3.ini located) Z:/home/deck/local/steam/steamapps/common/Thief Deadly Shadows\System
6. run the installer and select thief deadly shadow in the window that appears
7. In the same way we launch the configurator, selecting our thief deadly shadow in the window that appears
8. Сonfigure everything as you wish and before exiting, click Apply and Close
9. Return to game mode and launch game :) Enjoy

I noticed one thing that if you move in a straight line, the character moves very slowly, and if you add diagonal movements, then the speed increases significantly, which makes the game a little unpleasant. Unfortunately, I don’t remember whether this is correct or a steamdeck problem