


Add SteamDeck=0 %Command% to launch params to unlock graphical settings
UI resolution is tied to rendered environment, upscaling can make text and ui hints fuzzy
Default run, without editing launch commands, renders severaly low fideltity graphics, with missing/cropped geometry, muddy transparencies.
Finishing the prologue, the game hung on the title logo as it faded away and never went away, prompting a restart. On continuing the save, the achievement popped and the game loaded the next cutscene. But... The game does not like the Deck put into sleep mode during a cutscene - even if paused. Hung the system, and muted the deck requiring a restart.
The developers have said they are working on the SteamDeck verification process. Hopefully this will improve stability, as well as default graphical fidelity.
In the meanwhile, playing without a custom launch command is not recommended due to severaly reduced fidelity. Otherwise game is quite playable, using a mix of low and medium, even a couple of high graphic settings, as well as some fairly agressive upscaling.

SteamDeck=0 %command%
All settings to medium, Xess 50% + TDP capped at 8 gets me about 2 hours and 40 minutes of battery life with acceptable FPS in most scenarios
Skills' and weapons' text required the zoom function to be read.
If you put the deck in sleep mode and resume the controller won't be detected anymore ingame. This can be fixed switching to Proton GE.
Tinkering is needed to add the SteamDeck=0 command to get improved graphics. Without that everything is stuck on low.

SteamDeck=0 %command%
With the latest 900$ steam deck, there is a few drops in quality at the prologue, I could only go to 30fps with unlimited fps in the prologue, however starting act 1 the fps goes all the way up to 50fps, neither are unplayable, these are with the low settings and the performance upscale.

Looks terrible with default settings but if you use the launch options you can tweak settings and it looks fantastic and runs well.
SteamDeck=0 %command%
Default config has occasional missing textures and in some areas it is unplayable as fog opacity is too strong so you cannot see where you are going. Thankfully easily fixed with correct settings
Without the launch options the menus do not let you change much graphical settings. Once you set them you can tweak the settings and with most on medium it runs at 30-45fps and looks fantastic. It's responsive enough to do all the battle mechanics and roaming and exploring the world is mostly smooth.

SteamDeck=0 %command%
иногда текст скиллов трудно прочитать, но в целом всё хорошо
за 81 час один раз зависла
Раза 3-4 застревал в текстурах
Нужно ввести SteamDeck=0 %command% в параметры запуска, чтобы разблокировать графические настройки в игре. Можно играть и по пресету, который выдают разработчики, но в таком случае игра будет выглядеть намного хуже. Я играл с такими настройками:
- Вид масштабирования: XeSS, производительность;
- Выключена вся постобработка;
- Сглаживание: высокое;
- Тени: среднее;
- Глобальное освещение: среднее;
- Отражения: низкое;
- Постобработка: низкое;
- Текстуры: высокое;
- Визуальные эффекты: низкое;
- Растительность: низкое;
- Затенение: низкое.
На OLED игра с такими настройками выглядит сносно, фпс почти стабльные 30, за исключением некоторых локаций. Можно добиться гораздо более лучшего результата, но это надо ставить мод, если есть желание побольше запариться, то там вроде и фпс выше будет при такой же картинке. Сам я этим не занимался, меня и так всё устраивает, игра в 30 играется отлично и никаких проблем с парированиями и уклонениями нет, а прошёл игру я на 100%.

Better playing it without spoilers at all. Play at least for 30 mins before judging the game.
Had to run game on desktop mode first. First run install runtimes and an epic laucher that you need to agree and click next (unable to do it in gaming mode)
minor artifacts due to resolution

steamdeck=0
sdweak, eclipe mod
sdweak
use sdweak, instal eclipse mod, 30-40 fps with low-medium settings

SteamDeck=0 %command%
Setup (OLED): Handheld Modus mit Low Settings. XeSS auf Performance, 30-40 FPS Batteriedauer ~1:30 Wenn Monitor dann nur HD Ready (1366*768) mit den gleichen Settings wie oben. Das Spiel schaut ganz passabel aus mit Low Settings auf den kleinen Schirm, und ist für mobiles Gaming koomplett geeignet!

Performance on Linux is pretty are par with windows it seems and is at worst tollerable on the steam deck. Framerate could be better
First install you have to install c++ distributables, there's one yes check box and another window where you have to check a box and hit install, but only the first time
Just in some parts the text is small, unless you have issues reading up close you'll probably be fine, some points it's helpful to use the magnifying shortcut
In the mansion there's some really gross light artifacts with Decky framegen, and you need to use that or xess to make the framerate at least up to 30 in most parts of the game if not slightly under that
I had one single crash when trying to stream it from my linux desktop to the steam deck.
This is one of the better performing UE5 games on linux. It's just so unfortunate how unoptimized the engine is, it's really not this games fault. You can get decent performance on beefyier hardware.

It depends on how much you value the visuals. Everything else is intact: story, gameplay, voices, and music.
Visuals are just severely degraded, but on the upside, the frame rate mostly remained at 45

The game is high quality, but the Steam Deck really doesn't do it justifice with the degraded visuals.
Visuals quite poor with default OOB setting presets.
Great game, poor quality visuals.

SteamDeck=0 %command%
I've recently been playing it more on my Steamdeck OLED with settings I got from reddit u/EnemyGamer for better visuals (this is what I changed to play at 800p and 30fps)
Properties > General > Launch options type in: SteamDeck=0 %command%
Graphic settings:
TSR - Custom
Resolution Scale - 40-50%
Max FPS - Unlimited
VSync - Disable
Display Mode - Fullscreen
Screen resolution - 1280x800
Anti Aliasing - Medium
Shadows - Medium
Global Illumination - Medium
Textures - Medium
Motion Blur - Enabled
Film Grain - Disable
Chromatic Aberration - Enabled
Vignette - Enabled
all else LOW
Steam Deck Performance Setting (...):
Use per-game profile - Enable
Frame limit - 30FPS
Allow tearing - Enable (better input response)
Scaling filter - Sharp
Sharpness - 0-5 (set as you prefer)
all else untouched

skills
Set graphics to medium, antialiases to high and enabled DLSS through Decky Framegen. Game run stable at 30

SteamDeck=0 %command%
The text is too small but readable.
Default settings look atrocious.
Once the game opens up into the overworld, the game slows to a crawl. Lower the settings to medium or low and you can walk around normally.
Change the textures and antialiasing to high or epic with the other settings to medium. Use TSR at 60%.

Game works out of the box, it just needs the touchscreen on first start for installing unreal's runtimes. It even has a custom (but limited) preset for Steam Deck, wich works pretty fine. It does not have FSR support, so you xan choos between TSR or XeSS. TSR seems to do a better job in this game.
If you are not afraid to thinker a bit, you can use Decky Framegen, on that way you'll unlock all the graphics options. Selecting "DLSS" will actually use FSR 3, wich is your better option for both visual quality and performance.

40 fps, 10w tdp for 1h30m to play
font is so thin, difficult to read
use Decky Framegen to mod DLSS for more fp and smooth gameplay
Slightly slightly lag lag in a crowded area.
The current rating is "Unsupported"; I hope it can improve in the future, especially regarding the font and the blur effect behind the subtitles. I spent over an hour enjoying it on my SD

SteamDeck=0 %command%
Used vcrun2022
Needs some tweaking but nothing too advanced.

SteamDeck=0 %command%
Unlocked graphic settings with command. Set fps lock to 30. Anti-Aliasing to Medium. Textures to High. Shadows to medium. Everything else is low. Xess - quality.
This settings completely changed the game, it started to look really beautiful and lighting bugs (like in mansion) disappeared. Default preset is a real mess compared to this one.
Comfortably playable in stable 30fps

Maximal 40 fps, TDP auf 10 Watt
Ingame Menüs (z.B. in Kämpfen) mitunter sehr klein
Grelle Bilddarstellung, manche Bereiche sind zu hell, Farben wirken invertiert.
Läuft gut auf dem Steam Deck, braucht aber noch Patches wegen Darstellungsproblemem.

Game runs better than Valve's grading would indicate. Still needs minor in-game tweaks but runs just fine.
Set framerate limit to 30. The game can't pull 60 on Deck anyway.
Skill point costs are really tiny and a lot of descriptions are small and hard to read.
Default scaling looks bad. Set the graphics settings to TSR Scaling, Epic and the game will look a whole lot better.
The game certainly works better than Valve's Unsupported rating suggests. Certainly not flawless but I was able to play just fine and even took out some optional early-game bosses on Deck.

I played very little on the steam deck, just wanted to make sure whether the game runs at all. I had to set the upscaling to ultra performance in order to get ~40-45 fps in the initial location. But all in all the game seems to be at least playable.

Runs 35-45 FPS with stutters but has graphical glitches on Steam Deck preset. Bad performance on non-Steam Deck presets.
Lighting artifacts
Has built-in Steam Deck graphical preset with limited customizability. Runs mostly 40-45 FPS with stutters. Traversal areas will dip into the 30s. Certain areas have bugged lighting on Steam Deck preset. Using SteamDeck=0 unlocks full graphic options but has much worse performance.

Graphics settings are limited on deck, some settings like changing vsync don't seem to apply. Default upscaling with XeSS gives a stable 30fps with some room to spare in the Lumiére area.

Apart from the graphics menu everything seemed to be fine. I didn't want to change the small text size, but some might.
Two installers which needed clicking on with STEAM+trackpad. Only on first launch and worked fine.
Controller was not usable in graphics settings menu, needed to use touchscreen.
Graphics menu didn't have all items available that were there on the Linux desktop. Not sure why. 800p screen maybe? I was happy to be able to replace XeSS with TSR 75% and then turn off motion blur. Could do with the other options present though. Frame rate appeared locked to 45fps.
Seemed like it would be possible to enjoy this on the Steam Deck. Text size is annoying for the very smallest rendering but it's not used a huge amount. Performance OK but limited to 45fps for some reason. TSR much better than XeSS.