Ethan Lee sent out a teaser tweet earlier about Owlboy, as it seems he is porting it and wanted to get in first before it ends up popping up on SteamDB.
Defender's Quest: Valley of the Forgotten (DX edition), the rather excellent Tower Defence and RPG hybrid has been updated to get gamepad and Steam Controller support.
Shadow Tactics: Blades of the Shogun is the rather good top-down stealth game from Mimimi Productions. It's now out way a day-1 Linux release and it has a demo.
SHENZHEN I/O is the new simulator/puzzle game by Zachtronics, the creators of other excellent games like Spacechem, Infinifactory and TIS-100. After being on Early Access for some time, it's now available on Steam since November, 17th.
The Dwarves is a rather great looking tactical action RPG from KING Art that arrived on Linux with a day-1 release. I managed to get a press key to take a look and here's my findings so far.
Master of Orion was somewhat eclipsed by Stellaris for me, but it has come back with a vengeance today with the release of a major patch and a race pack DLC.
GOG are going all mysterious on us, with their Twitter account simply popping out a big teaser image for December 1st. Time to get our thinking hats on.
I know a few people who will be happy about this! Event[0] is to gain a Linux beta shortly after the developers got the Linux build to run smooth and stable.
Some people in our comments recently were hoping that when Cossacks 3 is released for Linux, that it would see the Linux version on GOG. The good news is that it will.