Steam has started the Remote Play Together Sale.

More information about the Remote Play Together-feature of the Steam client can be found here.

The free Update 1.5 and the (paid) DLC Taste of Adventure to the game Parkitect are now availabe for Linux on Steam.

The big free update to Version 1.5 and the paid Taste of Adventure expansion are available now.
Here's a summary of all the changes:

Taste of Adventure expansion (paid):

The (paid) DLC "Utah" for the American Truck Simulator is now available for Linux on Steam!

Features

The Steam Halloween Sale 2019 has begun!

It will last until 01.11.2019.

Valve has released the Version 4.2.8 of Proton in the Steam Client for Linux:

4.2-8:

The Steam Summer Sale 2019 has begun!

This time it will last until 09. July 2019.

As expected, the Steam Store is currently experiencing connection problems - so just be patient. :-)

EDIT: the connection problems have now been solved.

The huge "June 2019 Update" for Civilization VI: Gathering Storm has been released today for Linux (Note: same day as other platforms).

The list of changes is long, very long....