Hello @Vasil3333, support for the changing requirements of multiple third party launchers can't be generalized into a single topic and needs to be evaluated on a per-game basis. Feel free to add your experience to the individual compatibility reports of games which you're seeing issues along with logs and your system information.
Nothing extracted yet.
Compatibility Report
System Information
I confirm:
Symptoms
Games don't start or fail to initialize properly because of their 3rd party launchers because 3rd party launchers try to connect to some servers and get like a validation information.
All games that i own and that have an external launcher have always been a hit or miss with proton. And what works today might not work tomorrow which makes the whole proton/linux experience a failure, since if i want to play a specific game , i want it to work NOW not maybe half a year later.
Proton needs heavy development in the not so "3d" space.
Basically do what actions the launchers want to do.
Reproduction
Try to start the game