Core Keeper Server Hosting

A dedicated server has its own address rather than a host player, so your group connects straight to it from the multiplayer menu. That is the practical difference from hosting in-game: nobody has to be online first, and the world does not close when one person leaves.

The slot count is yours to set in the panel. Core Keeper is built around a small group sharing one base, so most servers run comfortably in the single digits, and pushing the number high is a memory question rather than a licence one.

Three GB is a sensible start. What raises it is not player count but explored ground: every tile you dig stays in the world, so a long-running map with sprawling tunnels and heavy conveyor automation is what eventually asks for more.

Yes. Mods are installed server side over FTP, and everyone connecting needs the matching set, so agree the list with your group before adding anything. Take a backup first, since a mod that touches world generation is awkward to undo halfway through a save.

You can. Stop the server, upload your existing save over FTP, and point the world index at it. Keep a copy of both the local and server saves before you swap, because this is the one operation where a mistake costs real progress.

Yes. The world seed and world index are server settings, so you can start a new map whenever the group wants a reset. Old saves stay on disk unless you delete them, so a fresh start does not have to mean losing the first one.