Another new stable Steam-Client 07.10.2021 has been released for Linux. It contains an improved Vulkan-Shader-caching among other things:

Steam Client Update, October 7

A new Steam client has been released and will be automatically downloaded.

General

When Steam detects a game file has been corrupted, it will now try to reuse as much of the corrupted file as possible to save bandwidth when downloading correct data for that file
Fix bug causing slow reconnect to Steam after resuming from a system suspend

Valve has released another update for Proton: Proton 6.3-7.

6.3-7:

RetroArch, the universal emulation-frontend/framework, migrates it's Linux-version on Steam from AppImage to Soldier Runtime:

Hello everyone!

For the American Truck Simulator and the Euro Truck Simulator 2 a new (paid) DLC is now available for Linux on Steam: the "Volvo Construction Equipment".

The Volvo Construction Equipment DLC includes 5 different branded construction machinery from Volvo CE's line-up for drivers to haul and deliver across the USA.

The Version 2021.09.20 of the (game-)development-tool AppGameKit Studio is now available for Linux on Steam.

AppGameKit Studio 2021.09.20 update released!

Welcome to the September update for AppGameKit Studio. This new version brings support for Android bundles to ensure apps comply with the Google Play store rules and regulations. The full list of changes are listed here:

iOS

Not even a week after the last release, another stable Steam-Client 14.09.2021 has been released for Linux with even more improvements and bugfixes:

Steam Client Update, September 14

A new Steam client has been released and will be automatically downloaded.

Library

Stop displaying a demo banner in the header for certain titles that are not demos.

Linux

ATOM RPG Trudograd, the stand-alone expansion to ATOM RPG, is now available for Linux on Steam!

Please note: Since Trudograd continues the story of ATOM RPG it is recommended to play the previous title before the sequel.