ARMORED CORE VI FIRES OF RUBICON is a seriously exciting upcoming release from the ELDEN RING developer FromSoftware. Seems it will run well enough on Steam Deck at release!
Valve gave it a Steam Deck Playable rating with Proton 8.0-3 on August 12th, with the rating just now going live. It's Playable and not Verified due to it having some in-game text that might be too small. Hopefully this is something that FromSoftware will address, because it's an annoying reoccurring issue even on desktop some games text is just tiny.
As a huge fan of games and media with big mechs, ARMORED CORE VI FIRES OF RUBICON is something I'm going to be taking a look at for sure. So I'll be letting you know if it runs properly on desktop Linux and Steam Deck just after release.
ARMORED CORE VI releases August 24th at 10PM UTC for the Steam release.
They also recently did an official showcase you can view below: