Anodyne 2: Return to Dust, the sequel to 2013's Anodyne is coming this year and it turns out the developer does plan to support Linux.
The original Anodyne does have a Linux version, which sadly uses Adobe AIR (Adobe dropped Linux support for AIR in 2011) and so it's no longer advertised on Steam (the download is still there). When looking over it today, I noticed that Anodyne 2: Return to Dust had a SteamOS icon on Steam and system requirements for "SteamOS + Linux".
I reached out to the developer, who confirmed it's coming as they're now using Unity. However, they're looking to cover just Ubuntu and SteamOS so if you use other distributions you likely won't see much support from the developer. Not an issue for me, most developers only support one or two distributions officially anyway.
Play as Nova, the Nano Cleaner, who is tasked with collecting dangerous Nano Dust growing throughout New Theland, which then must be returned for recycling to a mysterious entity, only known as the "Center".
Walk or ride across a lush, moody world. Discover strange characters and places. Shrink into characters and collect Nano Dust through 2D, Zelda-like gameplay, reminiscent of Anodyne 1.
Discover the true nature of the Nano Dust, Nova, and The Center, in the latest game from Analgesic Productions.
The good news is that you won't need to have played the original to enjoy it.