

Works perfectly fine
Its Perfect, works fine without any issues

GE-Proton required for the cinematics, everything else works OOTB

Due to some missing codecs on Proton your game will be stuck on cinematics since the DLC release. Use ProtonGE and you'll be fine

Near perfect game for the Steam Deck. I played in fact for some 31 hours, mostly offline.
One or two pixel-wide lines are misaligned during cutscenes. Barely noticeable.

Works great out of the box, be careful about controller
Fullscreen resolution initially cut off on my ultrawide monitor, fixed by switching between fullscreen and windowed a few times in the in-game options
One time my B button on my Xbox One controller stopped working completely, needed to force exit the game because I was soft-locked. Didn't happen again.
Had some minor hiccups with fullscreen and the controller not working properly, but were resolved and I was able to beat the game.

mangohud gamemoderun %command%
In some scenarios, the audio doesn't start playing at all, or it's delayed. It appears that this issue is related to the game itself, and has no relation to compatibility on Linux or Proton.
Played with Proton-Experimental [bleeding-edge], 1080p fullscreen with 60 FPS stable.
Amazing metroidvania, runs wonderful in linux environment.

When playing set the voice acting to Spanish, because it sounds much more befitting the setting than the English voice acting

No tinkering needed

Installs and plays without and issues
Smooth gameplay, works great on linux with latest Proton.

The game doesn't run
Tried a few different Proton / GE versions, nothing works. How are you guys able to get it running?
Perfect ootb

Audio crackle happens twice in 30 hours game time, when it happens you will need to restart the game then the crackling is gone.
It can slow down to low 50 fps for no reason but it's very rare, happened only twice in my 21 hours of play time and for a pixel 2D game it uses quite a lot of battery, on full charge it runs for less than 3 hours and when I try to limit the TDP to 8W it won't even run at 60fps. 4x fps at 5W and 5x fps at 8W.
Turned black screen once, and there was a few times upon quitting the game, the screen turns white with Penitent one avatar on the screen with a loading bar under the avatar. the loading bar stucks over 3 mins, sometimes it does quit the game back to SteamOS interfact, sometimes the loading bar stuck and had to force shutdown steamdeck by holding the power button and power on again.

TDP to 5 Watts
Played the whole game on the Deck, 0 issues, problems or anything of note. Changed TDP to 5W, still got 60 fps in every part of the game (including every boss fight and big setpiece). No text issues either. Conclusion: Made for the Deck.

Worked as if it were a native game.
I played for a bit over 20 hours and explored the whole game, never had any issue. This was on a fresh system install, using the default Proton.

Works out of the box.
Played for 9 hours – mostly on my desktop PC with PS4 gamepad – a few short sessions on Steam Deck. Everything runs fine. Even button prompts are correct.

Use proton 8
Didn't work with Proton glorious eggroll but works flawlessly with Proton 8.

16:9 only
Played for three hours, no problems so far.

Worked flawlessly, great game

It's a great game in the same line of the original Blasphemous. It's beautiful, and the music is incredible.
It feels sluggish, but nothing that makes it unplayable

Works perfectly out of the box! I'll be putting some hours into this.

I didn't even tweak anything. Cutscenes works out of the box, unlike the first one. Run and enjoy.

Running perfectly, no tweaks needed.

I haven't played much, but I wanted to give an early report to help others (currently, there are no other reports, and it is still pending official Steam Deck Verification). It played great and I had no issues in the time I played. No tinkering required.
I will update when I play more/if I run into issues/when I finish the game.