Originally posted by Eternity Circle:

you can it's working perfectly on it!

Wow, seriously? Like the OP, I'd thought this might make a great Deck game, but the store page says it's unsupported -- not unverified -- so I haven't even bothered trying. I'll download it in the next day or so and give it a go, but since it's working for you, are you using Proton at all or just playing it straight?

Seems there's no linux version from the store info so it will work with Proton.
But I don't use specific a version of Proton compatibility in the properties so you can download it straight & play, cloud saves are working too.
I just started replay it & put more hours on the Deck than I did originally.
Still a quite difficult game as you can die very quickly & loose most of your progress.

Well of what I saw, seems most of the time the unsupported tags are put directly when there's a part of mutli-online anti-cheat or VR stuff not supported, even if the solo part is working fine.
Maybe it was tested on a earlier version of Proton which didn't worked...

only just realised i could play on deck, i saw chuck ragan play live and it made me wanna play again. cant believe the 'unsupported' tag is still there, valve should really update that. a lot of ppl must be missing out.

Really glad to hear it works on the steam deck, I've recently booked a trip to Berlin to see Hot Water Music and I've been itching to get back on this game ever since.