


windowed mode works only
in windowed mode I can move cursor only on some smaller square than whole display. So cursor is limited to some lower resolution (screen size) than steam deck has. (playing on steam deck default screen 1280x800 - no external display)

By default with Proton Experimental, the games launcher will not run but the game shows as running. Switching to Proton GE 9-9 makes the launcher work and also the game itself. No need to rename .exe files or anything.
Steam wants to start ShadowsOnTheVatican_1/SotV_Launcher.exe
, but that doesn't work, we need to start ShadowsOnTheVatican_1/hd/SotV1.exe
. With Proton 8 the older tips on this page don't work anymore, this is how I managed to start the game: create an executable script ~/vatican.sh
that contains
cd /home/almos/.steam/debian-installation/steamapps/common/ShadowsOnTheVatican_1/hd/
/home/almos/.steam/debian-installation/ubuntu12_32/reaper SteamLaunch AppId=286360 -- /home/almos/.steam/debian-installation/ubuntu12_32/steam-launch-wrapper -- '/home/almos/.steam/debian-installation/steamapps/common/SteamLinuxRuntime_sniper'/_v2-entry-point --verb=waitforexitandrun -- '/home/almos/.steam/debian-installation/steamapps/common/Proton 8.0'/proton waitforexitandrun '/home/almos/.steam/debian-installation/steamapps/common/ShadowsOnTheVatican_1/hd/SotV1.exe'
and in Steam set the Launch options to ~/vatican.sh # %command%
. With these the game runs perfectly.

6.5-GE-2 GloriousEggroll
Launch options: cd hd && ./SotV1.exe %command%
Launch options: cd hd && ./SotV1.exe %command%
I tried previously running ./hd/SotV1.exe but it did't work, you have to be in the directory. Also %command% serves no purpose but if i don't include it Steam launches it with default options.

Doesn't even open anything. Keeps it's process running in the background.


Game is running but nothing shows up
