Starsector (formerly "Starfarer") is still in development but it's been a seriously impressive game for years. Not yet on Steam or any other store, as you have to buy it direct, but don't let that stop you with a big update out now.
https://www.gamingonlinux.com/2025/03/starsector-one-of-the-best-space-rpgs-thats-not-on-steam-had-a-huge-update/

Sea of Thieves crossing over with Destiny doesn't make a lick of sense, but here it is anyway - https://www.rockpapershotgun.com/sea-of-thieves-crossing-over-with-destiny-doesnt-make-a-lick-of-sense-but-here-it-is-anyway #MultiplayerCooperative #MultiplayerCompetitive #ActivisionBlizzard #ActionAdventure #XboxGameStudios #XboxSeriesX/S #SeaofThieves #SinglePlayer #Thirdperson #Firstperson #Simulation #Activision #OpenWorld #Destiny2 #Shooter #Sandbox #XboxOne #MMORPG #Bungie #Rare #RPG #PS4 #PS5

Mojang have released the latest update for Minecraft, the Spring to Life drop. This is part of their sped-up release schedule to bring more updates to the game.
https://www.gamingonlinux.com/2025/03/minecraft-spring-to-life-drop-is-out-now-with-more-mob-variants-and-ambient-features/

Hello Game have somehow done it again. No Man's Sky has another surprisingly large update available adding in more new content like a fossil beds to dig up skeletons and big fights against huge guardians.
https://www.gamingonlinux.com/2025/03/dig-up-planets-for-skeletons-and-fight-huge-guardians-in-the-latest-no-mans-sky-update/

The Witcher 4 won't come out before 2027, so chill out would you - https://www.rockpapershotgun.com/the-witcher-4-wont-come-out-before-2027-so-chill-out-would-you #ActionAdventure #XboxSeriesX/S #CDProjektRED #SinglePlayer #TheWitcher4 #Blockbuster #Thirdperson #CDProjekt #OpenWorld #RPG #PS5 #PC

While there's no current release date for the Steam release, Infold Games are still working towards it for Infinity Nikki and it seems it may be good news for Steam Deck players.
https://www.gamingonlinux.com/2025/03/infinity-nikki-devs-are-working-on-steam-deck-support-for-the-steam-release/

Mechs and alien spiders run amok in the grim retro warfare of Beta Decay - https://www.rockpapershotgun.com/mechs-and-alien-spiders-run-amok-in-the-grim-retro-warfare-of-beta-decay #Shooter:FirstPerson #Shooter:ThirdPerson #Survival&Crafting; #RotoscopeStudios #ActionAdventure #SpaceCombat #Exploration #Simulation #BetaDecay #Roguelike #OpenWorld #Indie #PC

Playable GTA 6 map mod Project Vice is no more following Take-Two copyright strike - https://www.rockpapershotgun.com/playable-gta-6-map-mod-project-vice-is-no-more-following-take-two-copyright-strike #MultiplayerCompetitive #MultiplayerCooperative #Take-TwoInteractive #Shooter:ThirdPerson #GrandTheftAuto6 #GrandTheftAutoV #ActionAdventure #RockstarGames #XboxSeriesX/S #RockstarNorth #SinglePlayer #Thirdperson #Firstperson #Fullproduct #OpenWorld #ModernDay #Xbox360 #Shooter #XboxOne #Racing #PC

Minecraft Live has been and gone again and this time there was some pretty big news. Vibrant Visuals was announced as a future major upgrade, which will bring some fancier looking graphics to Minecraft.
https://www.gamingonlinux.com/2025/03/minecraft-is-getting-a-graphics-overhaul-with-the-vibrant-visuals-update/

Assassin’s Creed Shadows is out now and it's Steam Deck Verified, so I took a look to see if it deserves the rating. The good news is that it will also work on normal Desktop Linux with AMD GPUs but NVIDIA GPUs have problems.
https://www.gamingonlinux.com/2025/03/assassins-creed-shadows-out-now-steam-deck-verified-but-has-nvidia-problems-on-desktop-linux/

Shield-slinging open worlder The Knightling goes all Jak & Captain America in August - https://www.rockpapershotgun.com/shield-slinging-open-worlder-the-knightling-goes-all-jak-captain-america-in-august #ActionAdventure #TheKnightling #Platformer #OpenWorld #Fantasy #PC

Initially Ubisoft said it wouldn't be supported, then they said it would be and now Valve have said that Assassin's Creed Shadows is Steam Deck Verified.
https://www.gamingonlinux.com/2025/03/assassins-creed-shadows-is-steam-deck-verified/

Nightingale from Inflexion Games continues improvements during Early Access, with the latest patch out now with the developer trying to get it Steam Deck Verified.
https://www.gamingonlinux.com/2025/03/nightingale-gets-font-improvements-for-steam-deck/