Feral Interactive have just announced, that Total War: THREE KINGDOMS "is coming to macOS and Linux shortly after the Windows release on March 7th, 2019.":

Total War: THREE KINGDOMS is the next great historical strategy game in the award-winning Total War series, and the first to explore ancient China as a theatre of conflict.

The just released so called "Sagan"-update to the management/building game Surviving Mars finally fixes the long outstanding startup-bug on Linux and adds challenges among a lot of other things:

For the RPG Pillars of Eternity II: Deadfire the huge Update 3.0 as well as the new DLC "Seeker, Slayer, Survivor" has been released for Linux on GOG and Steam.

About the DLC:

Another version (0.4.20) of Lutris has been released.

This time it adds some new features:

lutris (0.4.20) bionic; urgency=medium

* Fix detection of winetricks path
* Improve visual feedback on wine download dialog
* Add skill and command-line arguments for Zdoom
* Add option to disable joypad auto-configuration
* Restore refresh rate on monitor reset

-- Mathieu Comandon Mon, 24 Sep 2018 20:46:46 -0700

sc-controller, the Linux-User-Mode-driver for the Steam- and other controllers (e.g. DS4), has been released in version 0.4.5 today.

The main-developer Kozec said on Patreon, that he disagrees with the direction of the Linux-Kernel-developer-community, and that he is not going to release more versions of sc-controller for a while:

The Gardens Between, a beautiful Puzzle-Adventure, in which time itself is manipulated, is now available for Linux on Steam!

The Gardens Between is a single-player adventure-puzzle game about time, memory and friendship.

For the Multiplayer-Shooter Verdun the huge ANZAC-Update has now been released for Linux on Steam.

It adds the troops of the Australian and New Zealand Army Corps to the game and improves many things audio- and sound-wise:

Game Update - Welcome the ANZACs massive sound update!

1918 Australians as could be found at Villers-Bretonneux