The "Roguelike Expedition-Simulation-Game" Curious Expedition has received a new free update, which also adds a multiplayer-mode called "Rivals":

New content update: RIVALS
Find the golden pyramid to access the Curious Expedition 2 Closed Alpha!

Have you ever wondered what Curious Expedition would be like as a massively multiplayer game? Make sure to play the new RIVALS mode we launched today to find out!

The GOG Black Friday Sale 2019 has begun, with discounts up to zu 90%!

The sale will last until 03.12.2019.

The new version 0.5.4 of Lutris has been released.

Again there are a lot of features and improvements:

lutris (0.5.4) eoan; urgency=medium

The newest Update 1.4 for the Farming-Simulation Stardew Valley is utterly extensive and has been released just now on Steam.

Here is the "condensed" version of the Changelog (without spoilers);

Hi everyone,

The Funfair Simulator Virtual Rides 3 adds new rides with the Update 1.7.

Also the (paid) DLC "The Falcon" has been released.

Hi,

we just released version 1.7. Here are the changes:

Sigma Theory: Global Cold War, the "" leaves Early Access after seven month with a new update.

Sigma Theory is finally out of Early Access!
The 1.0 update is available to download from Steam now!
The current game has nothing in common with the one we've released 7 months ago. We've worked hard fixing bugs, improving feedbacks, adding content, fine-tuning mechanics and balancing gameplay with your feedback and support to come up with the best version of the game you get today!

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):