An American Truck Simulator server does not know which map, DLC and mods to run until you tell it. That information is in server_packages.sii and server_packages.dat, and both files are produced by your own copy of the game.
1. Turn on the developer console in the game
- On your PC, open the game's
config.cfgfile in your Documents folder for American Truck Simulator. - Set
uset g_developer "1"anduset g_console "1". - Save the file.
2. Load the profile you want the server to use
- Start the game.
- Enable exactly the map DLC and mods your server should run. This profile defines the server.
- Load into the game world, not just the main menu.
3. Export the packages
- Press the ~ key to open the console.
- Type
export_server_packagesand press Enter. - The game writes
server_packages.siiandserver_packages.datinto your American Truck Simulator folder in Documents.
4. Upload them to the server
- Stop the server in the Game Panel.
- Open the Files tab and upload both files next to
server_config.sii, replacing the existing ones. - Start the server and watch the console as it loads the packages.
5. Rules that save you a ticket
- Everyone who joins needs the same map DLC that the packages were exported with. A player missing one is refused.
- If you add or remove a DLC or a mod, export the packages again and upload them again. The server will not pick up the change on its own.
- Export after a game update as well. The files are tied to the game version.
- Both files belong together. Uploading only the
.siiis a common mistake.
If the server refuses to start after an upload, restore the previous pair of files and open a ticket with the console output.





