linux you miss a req files
missing 'CrabGameLinux_Data/Plugins/libsteam_api.so'
missing 'steam_appid.txt'
appid is 1782210 (put this text into steam_appid.txt in the root dir alongside the game executable)
grab libsteam_api.so from
https://github.com/rlabrecque/Steamworks.NET/releases/download/15.0.1/Steamworks...
Credits to Frantisek Veverka
Mac idk go watch youtube for that