Click 'Enable Steam Play for Supported Titles.' Alternatively: Go to Steam > Settings > Steam Play and turn on the 'Enable Steam Play for Supported Titles' option. From here, click on the Steam Play button at the bottom of the panel. Then click on settings to open a new window. Activating Steam Proton for Linux: Proton is integrated into the Steam Client with 'Steam Play.' To activate proton, go into your steam client and click on Steam in the upper right corner. Some games may not work or may break because Steam Proton is still at a very early stage.ġ. This guide describes how to use Steam Proton to play and run Windows games on your Linux computer.