For Stellaris the new (paid) DLC "Ancient Relics" has been released for Linux on GOG and Steam.

Also Stellaris is currently available for free on GOG Connect, and the huge Update 2.3 ("Wolfe") has been published!

A huge patch 1.6.0 and a new (paid) DLC "Urban Warfare" are now available for Linux on GOG and Steam!

Urban Warfare brings 'Mech combat to the vast cityscapes of the Inner Sphere! Electronic warfare, large-scale building destruction, environmental mechanics, new enemy units and more make the urban sprawl a whole new battlefield.

SteamWorld Quest: Hand of Gilgamech, the new card based RPG from the developers of SteamWorld Dig and SteamWorld Heist, is now available for Linux on Steam!

The Update 1.3 to the racing simulation Revhead (which was originally released in 2017) is now available on Steam.

It contains an overhauled and improved simulation model, and also a lot of other improvements which were suggested by the community:

Update 22 - Version 1.3 is HERE!

Dear Revheads,

After months of works, finally Update 22 is here with version 1.3!

A new (paid) DLC for the management game Railway Empire is now available for Linux on GOG and Steam: France.

New scenario – Into a new time (1874-1890)

Map expansion: France (available in Free Game and Sandbox modes)

10 historical engines such as the Coupe Vent (4-4-0) and Forquenot (2-4-2)

The huge Patch 1.12.0 (Changelog) and the new (paid) DLC "Campus" for the city building simulation "Cities: Skylines" is now available on Steam for Linux!

For the city building simulation "Surviving Mars" the huge Armstrong Update has been released for Linux.
At the same time the DLCs "Green Planet" and "Projekt Laika" have been published.
Both DLCs are part of the season pass.