Valve: Windows games added to Steam on SteamOS and Linux now use Proton by default

Valve updated the Steam Client Beta so external Windows apps and games added to Steam on SteamOS and Linux now run through Proton by default. The October 7 beta also adds a setting to disable the screensaver while in game and fixes several bugs.

• Windows binaries registered as non-Steam games now run in Proton by default
• New setting to disable the screensaver while in game
• Fixed non-Steam games failing to launch after changing the target binary
• Fixed issues with the Stop button, controller reordering and BLE mode