For Tropico 6 the Update Nueve "Guagua" and another (paid) DLC called "Spitter" have been released for Linux on Steam.

Description of the DLC:

For the American Truck Simulator the huge Update 1.37 has been released for Linux on Steam:

American Truck Simulator 1.37 Release

After much testing, feedback, fixing and fine tuning, we are excited to announce the arrival of update 1.37 for American Truck Simulator!

A full year has already passed since the release of Trüberbrook on Steam and GOG.

For the birthday of the adventure, the developers now released an update for Linux which adds Steam Trading Cards.

Unbelievable!

The publisher Feral has released today the patch 1.0.3 for the Linux-version of Shadow of the Tomb Raider on Steam:

1.0.3 - March 10th 2020 - Linux

Fixes not being able to rebind any actions to ctrl or shift.
Fixes a number of minor issues.

The eighth update called Update Ocho (Edificio de Estacionamientos) for Tropico 6 is now available for Linux on Steam!

Fellow Tropicans!
A new free update for Tropico 6 is now available!
The new update will see improved parking decks and corresponding pathfinding, as well as general improvements, balancing changes and bug fixes for both the main game and DLC.

Check below for further details:

For the Coop-Multiplayer-game Payday 2 a new (paid) DLC has been released on Steam: "San Martín Bank Heist" (Bundle).

Also a huge free patch was published.

Welcome back to Sunny Mexico!

The newest update for Tropico 6 on Steam called "Feliz Navidad" (Version 7.1) brings snow to your island and some more Xmas decorations.

Also some bugs have been fixed:

Tropico 6 update ‘Feliz Navidad’ (version 7.1) has been released!

Fellow Tropicans!
A new free update for Tropico 6 is now available, bringing Xmas to the isles!