Is there anyway to “unlist” a session so that is can’t be found and joined?
I have it so when players join, they enter a lobby. From there the server can start the game when there’s enough players.
When the game has started, I don’t want players to be able to join. Is there anyway to do this with blueprint?
You can search for the advanced sessions plugin. With this you can set some “server variables” that are passed to the client when he search the session. There you can set a variable “Can Join?”
As someone already stated there is a plugin which you can use to achieve that, that functionality is only accessible through C++.