Radix Chronicle is an in-development tactical RPG from Marcus Sanders, better known as EpicNameBro for making videos about Fromsoft games and their own game will now support Linux.
Realm Architect is an attempt to make a next-gen virtual tabletop experience, while also keeping it simpler to get into and keep running. It also looks great and it's confirmed to get Linux support now too.
Love competitive games? How about when they're free to play? Dream Sloth Games are reviving Duelyst as Duelyst II, with approval from Counterplay Games.
Up for more pointing and clicking while adventuring? You've come to the right spooky place, with Foolish Mortals being announced with Native Linux support.
Zoria: Age of Shattering from Tiny Trinket Games is not a name I've mentioned for a while but the developer is back with an updated demo and a Kickstarter campaign to finish it up.
Paper Animal RPG is a rather cute looking upcoming game. Currently in development from Cuddling Raccoons Studio it's a mixture of exploration, dungeon crawling, combat and a little relaxation by the campfire too.
Titan Shell is an in-development twin-stick shooter from Meatbag Studio that blends in features from roguelikes / rogue-lites to offer a pretty interesting experience not many such shooters give you.
Ready for another beautiful and engaging looking metroidvania? Loved Hollow Knight? You should keep an eye on Nara: Facing Fire that's live on Kickstarter.
Love games like Hollow Knight, Ori and Celeste? Well, you're going to want to take a look at Nara: Facing Fire as it takes inspiration from all of them.
The Ranchers from French developer RedPilz Studio is a very promising looking open world country-life sim, which will be coming with Native Linux support and optimized for the Steam Deck.