The Alters is a brand new sci-fi game with a blend of survival, adventure, and base-building elements from 11 bit studios.
With the release now available, Valve have rated it Steam Deck and SteamOS Playable. For the Steam Deck, the only note is that it may have some text that's a bit too small but other than that it should run okay. Check out the launch trailer:

Direct Link
More about it:
The Alters is an ambitious sci-fi survival game with a unique twist. You play as Jan Dolski, the lone survivor of a crash-landed expedition on a hostile planet. To survive, you must form a new crew for your mobile base.
Using a substance called Rapidium, you create alternative versions of Jan - THE ALTERS - each one shaped by a different crucial decision from the protagonist’s past.
As you navigate through survival and moral dilemmas, you will explore a branching narrative filled with captivating character dynamics and challenging decisions.
"With the team steadily growing, the pandemic reshaping the way we work, and all the usual challenges of game development, these past years have been both creatively rewarding and full of hurdles," says The Alters Game Director, Tomasz Kisilewicz. "But now, as we stand on the brink of release, I’m proud to say we’ve delivered a game that stays true to its original vision—thanks entirely to the determination and talent of our incredible development team. They brought The Alters to life, and we can’t wait for players to finally experience it."
I have to admit with the absolute barrage of announcements and releases over the last year, this one completely flew under my radar but it looks really good.