Hello @LukeDearden, in general, we're tracking issues with games run with Proton in the Proton issue tracker. https://github.com/ValveSoftware/Proton/issues/3898 is the right place to ponder what's happening with this game.
Closing as a duplicate of https://github.com/ValveSoftware/Proton/issues/3898#issuecomment-1528944491.
Your system information
Please describe your issue in as much detail as possible:
Opening the overlay even when in the main menu crashes Hunt Showdown. The same action in the stable version of Steam works fine.
Steps for reproducing this issue:
Also I tried to provide the runtime output report from Steam/Help/System info. But that now crashes my gnome session