For certain steam games you will need a game token to be able to run these games.

How to get a steam token

Go to
Find the appid of the game you wish to generate a token for:
Team Fortress 2 = 440
Enter the appid and a name for the token:
Click Create and copy the login token
Put the login token into the TF2 Server Settings in your panel.
Was this article helpful?
Thank you!