: Tells the Steamworks API which game is being launched.
While there isn't a specific standard file titled "600 Steam.txt" in general computing, the naming convention suggests a configuration file, an application ID file, or a log used within the Steam ecosystem. Below are the most likely contexts for such a text file and how to create or use them. 1. AppID Reference ( steam_appid.txt )
Are you trying to with this file, or are you setting up a new game/server ? Dedicated Server Configuration Guide - Steam Community