On my PC Linux Manjaro, the game crash while loading a new game. I can access menu and all, but when i'm done, i see the loading screen, and crash to desktop without warning.
However, if i go to local folder and open a Terminal to launch the game, it works, showing this :
./Dominus\ Galaxia.x86_64 Set current directory to /home/tchey/Jeux/dominus-galaxia
Found path: /home/tchey/Jeux/dominus-galaxia/Dominus Galaxia.x86_64
[S_API FAIL] SteamAPI_Init() failed; SteamAPI_IsSteamRunning() failed.
[S_API FAIL] SteamAPI_Init() failed; unable to locate a running instance of Steam, or a local steamclient.so.
So i can play, but not from itchio.