

Works great out of the box currently (Proton 9), only can't type in save names with a controller, very minor issue.
No controller text typing - only an issue when naming saves

You need GE Proton to play some of the Pre-rendered cutscenes like the Company Logos.
Ran flawlessly outside of that. All of my Gametime is on Steam Deck. In 70 hours only had 1 crash. If you were disapointed with this game's Nintendo Switch port, the PC version on Steam Deck is what you're looking for.

Occasional slow down on loading screens.
Only issue I ran into was certain loading screens would take longer, usually ones connected through cut scenes.

40 fps frame cap
Playing boarderless window causes the game to stretch screen and somewhat overlap with the performance overlay
Launching the game through default valve proton with the new update causes blackscreen at launch, use proton 9.0.2
Stable 40hz throughout with graphics set to epic

mangohud gamemoderun %command%
wrong resolution
I had input lag, but probably nothing to do with the game

Runs great on Steam Deck OLED. 90 fps for 95% of the whole game. Dips when viewing demon models and when using elevators for some reason.
Turn off Framerate Smoothing for 90 fps.

Vários crashs.
É um ótimo jogo. Pena que ocorrem crashs em menos de 10 minutos de jogo (jogando sem alterar nenhuma configuração). Só consegui fazer funcionar retirando os limites de fps.

No issues and 4 hours for still a pretty looking game. If you wanted 60 and higher graphics you'd probably get 2 hours.
Locked to 40 frames and dropped to 10 watts, 4 hours of play time.

Игра идет замечательно. Прошел полностью и проблемм не увидел.

mangohud gamemoderun %command%
Occasional FPS drops. Usually in combat and because of the effects of weapons/shards.
Just one crash while changing maps.
Played with Proton-Experimental [bleeding-edge] in Cinematic (Ultra) settings, 1080p borderless fullscreen with 60 FPS stable.
Interesting game. Just install and play!

I run this at 40hz and 10w, this gives me around 4 hours playtime on an LCD Deck.
Lowered to 10W and 40hz
Works flawlessly OOTB

The game runs around 30-40 fps, which is perfectly playable but kinda weird given my hardware.

Works fine without any problems. From start to finish didn't encounter any problems.

Текст хорошо читаем, багов не заметил. Единственный недостаток, игра не поддерживает формат 16:10 из за этого сверху и снизу будут черные рамки.

Runs out of the box.
Works with mods. Do not use GE proton, will not launch that way.

After a restart and a wide variety of other troubleshooing steps, including several Proton versions, I have given up. This is the 5th of 40+ games listed as playable or better that has not worked for me out of the box and the 1st to not work after tinkering.
no issues after 3 hours of gameplay
gamemoderun %command%
Perfect performance with videos included
Offbrand Castlevania game. Very fun if you enjoyed Symphony of the Night and the games that fit that mold.
Small issue restricted to one specific sound effect looping when a certain box that can be pushed around is present on the screen.
Runs well without any further tinkering required.
Worked flawless with mods too
Pretty much perfect
Works very well
Plays perfectly fine, other than the cutscene after the first boss
Game hangs on a black screen if the cutscene after the first boss plays. Even with V-sync disabled, I still faced this issue. The problem can be avoided by skipping the cutscene ASAP. For safety, be sure to save the game before the first boss (the nearest save room is located below the boss room; you should see the black and orange boss room door after the second outdoors section).
Not a Proton-specific issue, but starting a NG+ run can cause the game to hang on the loading screen. This can be solved by removing all of your equipment before starting NG+.

VSync and frame smoothing must be turned off to prevent stuttering, and freezes at cut scenes. Other than that, it's been absolutely flawless.
The first cut scene is just a black screen unless V-Sync is turned off.
For the most part this runs as well as I would expect on Windows, maybe even better. I'm only seeing jagged frames when forced frame smoothing is on, which is a dodgy option anyway.
Newest update borked it for me.
gamemoderun %command%
I've previously been able to play it flawlessly, but with the latest update, I just get a "Fatal error" window pop up when I press play and see the initial black screen. Tried multiple different Proton versions, but to no avail.
Game runs pretty good OOTB.
Game would sometimes stutter when changing screens.
Continued from my Windows cloud save of two and a half hours. Aside from those slight stutters from changing screens the game ran with zero issues.
Limited framerate to 30fps
Crashes on cutscenes if frame is not limited to 30fps or below.
Update on my previous report. Would always crash on first cutscene until I limited fps to 30.
Tested with GE also. Did not fix issues.
Framerate would frequently dip
Game always crashed after first boss cutscene began to play.
Tried with Proton GE (Did not fix issues)
Works fine with occasional crashes
Final cutscene just has black objects
Ocassionally hangs at startup and during gameplay and have to kill it
Save frequently, crashes are not that common and unsure if it is a problem on Linux only. Last cutscene is either not rendered properly or it is a VERY weird cutscene.
No tinkering needed. The game works out of the box. 60 fps looks great. I don't recommend 40 or lower for battery life. Averaged around 4 to 4.5 hours.
gamemoderun %command%
Awesome history, graphics. No issues encountered!

If the cutscene after the first boss freezes the game, either tinker with the in-game VSync settings or try skipping the cutscene.
Besides that, game runs flawlessly with no issues whatsoever.
Switch to experimental, runs flawlessly
Full playthrough with no issues
Game works flawlessly out of the box. No glitches bugs or crashes in my 20+ hours playing exclusively on the deck.

Cutscene after first boss crashes the game, if not limited to 30 fps.
Otherwise works very good.