sudo pacman -S --needed nvidia-settingsFirst install Nvidia Geforce Experience on the game PC, turn on Nvidia Shield, then install Moonlight on the clients.
Setup OpenVPN if not in a local network. Add mstsc to Nvidia Shield if remote desktop control is needed. Do not use Windows’ rdp, as it will logout current user and Nvidia Shield would stop working.
Setup a gaming user if wanted. It could be the default user that can login without password.