Authenticate Your TF2 Server
To make your TF2 server visible in the public server browser, you need to authenticate it.
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Go to https://game.polisystems.ch and click on "Manage Instance." Then, navigate to "Startup Settings."
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Here, you will need to complete the "TOKEN" field. To generate this token, visit https://steamcommunity.com/dev/managegameservers and create a token for Team Fortress 2 (ID 440).
- Add this token in the designated field and restart the server. It will now appear in the public Valve server list.