LINUX Review (If you are on a different OS don't bother reading).
Edit: ALSO CRASHES WHEN COMMITING SCORE.
The way this game deals with multiple displays on linux (gnome3) is disabling one of them. And then not enabling it again after you're done. After I'm done I not only have to enable my display back, I have to put all my windows and taskbars where they're supposed to be.
This would be ok if it were something like GTA 8 or The Witcher 14. But here the game sessions tend to be rather short, so it's very frustrating. If you have multi monitor PC running linux, I'd recommend waiting to see if this ever gets fixed.
The requirements say "OS: Steam OS and Ubuntu 12.04 are the only supported Linux OSes". It is pretty much like saying 'Only windows XP service pack 2 is supported'. Service Pack 3 is not supported. Service pack 1 is not supported. Also you need a HP sticker on your box". The only two supported linux distributions are ones that aren't even listed in Steam Hardware & Software Survey, because no one uses them anymore (or yet in case of steamOS). If you're running one of those distros the displays might work for you.