Except there, Linux is nowhere mentioned. No one ported it to Linux, no one is selling a Linuxversion. Where does this path come from?
Topic on Talk:Deus Ex: Human Revolution - Director's Cut
Steam Play (Linux) is an auto-populated row triggered by the inclusion of a Windows release on Steam.
It's the path where the Windows version on Steam would store its files if you were to play the Windows version through Steam Play (Proton) on Linux.
Oh, it is something like Wine. I confused it with Steam OS then.