The long awaited Total War: Warhammer has finally been released for Linux!

My suggestion: buy it from Ferals own store.
This way they get the most of it.

A new, free DLC for Wargame: Red Dragon has been released for Linux on Steam.

It contains a very huge map, which has been layouted for 10 x 10 players.

Description:

Wargame: Red Dragon is back with a free and brand new 10v10 map: Russian Roulette

The Hotfix-Release 20161019 for OpenRA has been released.

It fixes two critical bugs in multiplayer.

A release-20161019 hotfix is now available with fixes for two critical multi-player bugs that were missed during the playtesting phase.

http://www.openra.net/news/release-20161019/

OpenRA, the free implementation of old RTS-classics like C&C (Tiberian Dawn), C&C: Red Alert, and Dune 2000 has released a new version just in time for Christmas.

It contains a lot of improvements like a global chat and a redesign of the server-browser.

Source: OpenRA Website

Description:

It is 1.9 GB in size: the Update 1.5 of Dungeons 2, a "Dungeon-Master"-like game. It is available now for Linux on Steam.

This Update includes many smaller and big changes. Here is the complete Changelog:

The developers of Planetary Annihilation released a new and massive patch on Steam also for Linux.

It changes a lot of things in the Singleplayer-Modus, which the community Community had wished for.

War for the Overworld, a "DungeonKeeper"-like game, is now available on Steam for Linux.

Description:

Tired of invading dungeons? It's time you build your own! War for the Overworld is a Dungeon Management Game that employs your favourite aspects of the RTS and God Game genres. Carve out your Dungeon and conquer the Overworld!