"Remote Play Together" is now supported.
No game updates are required.
With friends, You can also play multiplayer with people who don't have a Steam account via Steam Link.
Please refer to the official Steam website for more information on Steam features.
If you do not want to connect a controller with 1P when playing multiplayer, please change the controller settings from the Options menu.
Please check the controller connection, enable/disable, and who is using the controller on this screen, e.g., when the controller is not available even during single-player play.