Indeed, the Steamworks [api]ISteamMatchmaking[/api] and [api]ISteamMatchmakingServers[/api] APIs have this property, as do some of our own games, such as Team Fortress 2. In this case, you can use the Steamworks "Fake IP" system. A FakeIP is an IP that "looks" like a valid IPv4 address for most purposes, but comes from a reserved address space that is not used on the Internet. …

When we encounter in-game issues during testing, we make a note, and will double back to retest your game as soon as we're able to add the required functionality to Proton.[/list] Your compatibility report includes a complete list of tests run for each game. …

This version allows Steam to tell SDL to ignore input for controllers configured by Steam Input, which avoids double-input bugs. [b] 4. Have a plan for Xbox controllers [/b] If your game has already shipped and has XInput support that you're leaving in place, you may want to leave Xbox controllers in the XInput path by default. …