https://www.pcgamer.com/steam-may-be-getting-tools-that-will-enable-windows-games-to-run-in-linux/

Valve announced the Linux-based SteamOS in 2013, just prior to the reveal of the vaguely console-like Steam Machine PCs. It was a big, bold move that ultimately petered out: Valve ditched the Steam Machines section of its website in April, aalthough you can still hit it directly if you know the URL. 

SteamOS is still alive and kicking, though—in fact, the 2.164 update was pushed just a couple of weeks ago—and now it appears that Valve is aiming to dramatically broaden its capabilities. Members of the r/linux-gaming subreddit recently discovered text strings referring to, among other things, "compatibility tools" that would enable games designed for Windows—which is to say, pretty much all of them—to run on Linux. The functionality will apparently be similar to that of the well-aged Wine, but with the added muscle of official backing and support from Valve.