Valve released an update for Proton Experimental for February 27th, their testing ground for getting more Windows games running on Linux / SteamOS systems.
Another good one for fans of retro-styled beat 'em ups, as He-Man and the Masters of the Universe: Dragon Pearl of Destruction is releasing April 28th.
Grim Dawn is getting an update that will hopefully make the ARPG classic work better across different screen sizes and resolutions (like the Steam Deck).