Proton Experimental is the extra special testing area where new fixes and features enter the Steam Play Proton compatibility layer before going out to everyone and there's a new update out. If you're not clear on what Proton and Steam Play are, be sure to check out our constantly updated dedicated page. It's a special compatibility layer for running Windows games and apps from Steam on Linux.
Proton Experimental as of the latest update (March 3, 2021) has these extras added into it:
- Fix Xbox controller input and hotplugging in Hades.
- More PlayStation 5 controller layout improvements.
- Fix crash in Home Behind 2, Crown Trick, and possibly other Unity-based titles.
- Improved Virtual Reality startup time, and better compatibility with more games including Microsoft Flight Simulator, Gravity Sketch, Battle Arena VR, Until You Fall, and more.
To use Proton Experimental in the Linux Steam client you need to ensure it's installed. If you search for it in your Steam Library, it will show up like other games and software does. Then on any game in your Steam Library, just right click and go to Properties and then select it from the drop-down menu in the Compatibility section: