Tested on latest test build of steamOS Running the EA Play trial which its default settings force it to 30fps at high settings Changing settings to custom and setting everything to low gives you 60fps. Setting gpu limit to 700 and cpu limit 8 and locking to 40fps will allow you to get 3+ hours with smooth experience. change up the settings and set upscaler to fsr can get a better looking experience without breaking the battery stats.

EA play will prompt on start up and may require to authenticate or link an EA account or it will state 'Lets go' and will immediately load the game.