While most people generally talk about ChimeraOS, Bazzite and at times HoloISO, another choice for your handheld Linux gaming is winesapOS that just had a huge new release.
Usagi Shima: Bunny Island is a game I've been following for quite some time, as it looks adorable (and as a Rabbit owner I couldn't resist) and it finally has a Steam page.
Factorio is a game about building and automating, but it's also all about defending from vicious aliens and the new lot coming in Factorio: Space Age look like the stuff of nightmares.
If you love your classic RTS games, especially those from Westwood like Command & Conquer and Red Alert, you need to play the OpenRA mod Command & Conquer - Combined Arms.
Might be time for another run in Stellaris with the Cosmic Storms announced today to release on September 10th. Developed in collaboration with Behaviour Rotterdam, it's set to expand space weather in a big way.
Making it perhaps easier than ever to get more stores and launchers onto your Steam Deck, the NonSteamLaunchers plugin for Decky Loader is now available.
I'm sure you've all seen some of the more playful user reviews on Steam, but they're not exactly helpful for figuring out if you want to buy a game and so Valve have a new "Helpfulness System" they're testing.