Lin545: Please add the "Project: Zomboid" on the green list.
It has own dedicated multiplayer menu, own dedicated server possibility and multiplayer is played purely via (any) Zomboid client - (any) dedicated Zomboid server. One can connect directly by giving IP address in the window.
The steam and non-steam servers are held different, steam server does not allow non-steam clients, but non-steam server allows all clients.
I think only the master list is offered by PZ as public service. There is zero client-software dependency.
Does it also work in LAN with the direct IP method without any online connection?
I'm probably just asking because of my bad experience with NWN.