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A listen server is a OpenTTD network game Server that runs in the same process as the game client, allowing a player to both host and participate in the game easily. Listen servers have some limitations that Dedicated servers do not have.

Starting a listen server

Select Start server from the OpenTTD Multiplayer menu. You may now generate a new map, start a scenario or load a game. Singleplayer saves can be loaded for multiplayer and vice versa.

Configuring the server

There are 3 ways to change the settings of a running server:

• Use the graphical user interface, just like a single-player game. All server options such as Net frame freq aren't available this way.
• Use the console commands.
• With rcon. If the server sets rcon password, clients can also configure the server via rcon.

Differences between listen and dedicated servers

• Listen server runs in the same process as the game client, so at least one client is always in the game.
• Min active clients does not work on listen servers.