Forced compatibility to Proton Experimental. Would say Launching and Running but then nothing. Tried 9, 8, 4 same result.
Runs out of the box for my configuration
Changing to 40 refresh rate (with vsync on) and half rate-variable shading on managed to increase battery life by just over 25% (3:48-4:01) to (4:58-5) hours from 100% battery (using battery estimate in menu)
Supports gamepad so worked alright
Runs as it would on a Windows box. Flawless.
Downgraded proton from 4.11-11 to 3.7-8
Couldn't re-map keyboard to qwerty (I use dvorak outside games), even from windowed mode
no manual tweaking, everything runs out of the box, no problems at all
Complete gameplay works (tutorial, free play after completing tutorial, free play without campaign)
starting a campaign, playing for an hour, doing trading and looking around ports
The game does not start in any way.
Save files didn't show up, new saves don't get added to the list. Everything else seemed to work.
Experienced no problems.
Sound redirects to wrong device