Messaggio originale di Yoth:

It's waiting for background processes to finish. It might have to verify game files, install a game launcher like the EA App, some additional windows stuff, wait for cloud sync or something else along those lines.

Most of those have their own messages though, no?

For reference, the game was Spelunky 2 running on default Proton 10. So I don't think it has any third-party launcher to sync. I also witnessed this happening after playing the game for a minute, then closing it. I couldn't exit Steam the normal way or re-launch the game during this either, and ended up having to kill Steam.

My guess is that it’s compiling shaders, but I only say that because of the percentage tracker being shown after.