

PROTON_USE_WINE3D=1 gamemoderun %command%
Locked to 30fps and 6watts

Sometimes need to alt+enter two times to restore the game
Works fine on GE-Proton9-21 with video cutscenes and the correct depth of field (this was an issue with GE-Proton8-28). The Altus logo displays at the start of the game, all beginning cutscenes work, and the cutscene on Trisha's TV works. I played through the first boss with no issues reported.
No additional parameters are needed.
IMPORTANT! You must set the resolution to 1280x720 and use a borderless window. With a resolution of 1280x800, the Altus logo will work, but other cutscenes won’t.
The game will take a very long time to launch the first time on GE-Proton—wait until the game launches or the "Running" green label disappears in the Steam library.
I had a lot of truble to run this game with cutscenes, used protontricks etc., nothing worked for me. As I thought GE-Proton couldn't launch the game, I saw "Running" label in steam and no game window. Finally I tried to:
- remove all data in
.steam/steam/steamapps/compatdata/893180
, - remove
~/.steam/steam/compatibilitytools.d
content also - install fresh GE-Proton9-21 with ProtonUp-QT (install with Discover)
- don't forget to install drivers as GE-Proton requires
sudo pacman -S --needed lib32-mesa vulkan-radeon lib32-vulkan-radeon vulkan-icd-loader lib32-vulkan-icd-loader
- restart the Steam, then in the game compatibility properties tick the checkbox and select GE-Proton9-21
- clear all launch options in steam game properties
Then launched the game and waited for 5-10 minutes, after that the game worked like a charm.
Original Steam Proton-Experimental and v9 work, but there are no cinematics or color bars—just noise instead of the cinematics.

Full screen and 800p crashes the game
If it can't load a video it crashes the game
GE Proton 8-28 claims to have fixed the missing videos problem, but fact is, if you played it and not just looked at the intro and concluded that it works, it is not fixed at all. Literally 8/10 cases it can't load the video still and if it doesn't load the video, the game freezes and you have to close it. That goes for the intro and plenty of in-game cutscenes, maybe you're lucky and the intro works, cool, maybe after a level the cutscene does work, awesome and then it tries to load another one right after and it's dead, you have to close again. So no, this issue is still not fixed and I consider it unplayable because of it because if that happens, you have to replay the whole level and that sucks.

Flickering FMV cutscenes and blurry ingame cutscenes
Playing with ProtonGE 9-2 made all the FMV cutscenes work correctly. In the ingame settings change Depth of Field to "off" this fixes the blurry ingame cutscenes. Also change borderless window to fullscreen to stop FMV flickering. After these steps the game is working flawlessly for me.

Stuttery playback of some cutscenes, others missing entirely
Would not recommend playing with Proton Hotfix unless you already know the story, as otherwise you can miss a fair bit of context due to cut scene issues
Proton GE 9.1 also didn't work for me (the game never launched after several minutes)

40Hz/FPS and fixed 6W TDP for almost 6 hours. Also can play 60FPS with 7W.

From time to time video in cutscenes gets blurred. As if camera focus was changed. I event thought it should be this way. But at the second thought I think it is a something not right. Don't remember bluriness at these moments in my previous game experience
Finally it works! I tried many times couple of years ago and there were constant problems with cutscenes. That ruins the game. Now you just set Proton GE and run. First time it takes some time to start. But after this it is just fine. Set TLD = 10 to improve battery perfomance. Did it just in case, maybe it is not needed. But anyway no any problems. No any stuttering. FPS is stable 60.
The first time, the game takes a lot of time to run. Then, you can play correctly and videos plays well (previous versions didn't run them)

The game mode Babel works in Single. VSYNC on Off makes the cinematics stutters so it must be set to On. Display Mode always gets reset back to Borderless after restarting the game, you must use the Recommended Official Controller Layout for the game to recognize any input and the game might crash at any time. Stuck after choosing New Game but it works when choosing Load Game. When you progress further into the game, you get stuck on a different Loading Screen anyways so you can't play any further.

Not consistent 60 FPS but definitely more than playable (30 FPS+) with maximum settings 1280x720, which means there's room for adjustments to improve performance.

Still some crashes, but with this fix you can start a new game w/out issue and videos (cutscenes and sheep tutorials) play correctly!
PROTON_USE_WINED3D=1 gamemoderun %command%
Run the game once to create a Proton prefix, then use Protontricks to install Media Foundation (mf). Then in Desktop mode open Konsole on the Desktop and enter:
protontricks --no-bwrap 893180 --force mf_catherine.verb
added slight delay between dpad inputs; was difficult to turn in place without moving otherwise
Limited to 10 TDP, disabled graphical effects besides anti-aliasing
In-engine cutscenes are mostly blurred if depth of field is enabled. Disabling it fixes the problem.
Performance in 30s if in-game vsync is enabled. Disabling it, the game runs mostly 55-60 fps except when walking across the length of the Stray Sheep (of all places), where it dips into the 30s-40s.
Crashes occasionally at the end of a stage.
This game (when fixed) has come a long way on Deck; Far from perfect, and the occasional post-boss crash is annoying (waiting for the button prompts to appear on the results screen seems to help there), but it's very playable and runs at a good framerate. Limiting TDP and disabling graphical effects you can get about 2.5-3 hrs. of playtime per Deck charge. Just make sure you're installing the fix to a clean Proton prefix!

Still some crashes, but with this fix you can start a new game w/out issue and videos (cutscenes and sheep tutorials) play correctly!
PROTON_USE_WINED3D=1 gamemoderun %command%
Run the game once to create a Proton prefix, then use Protontricks to install Media Foundation (mf). Then in Desktop mode open Konsole on the Desktop and enter: wget https://gist.github.com/Neodamode/22871fae8020a87a6cd816ccac405358/raw/83f1c56add0adbcff9d116b2a51a157da7bcc954/mf_catherine.verb
added slight delay between dpad inputs; was difficult to turn in place without moving otherwise
Limited to 10 TDP
In-engine cutscenes are mostly blurred if depth of field is enabled. Disabling it fixes the problem.
Performance in 30s if in-game vsync is enabled. Disabling it, the game runs mostly 55-60 fps except when walking across the length of the Stray Sheep (of all places), where it dips into the 30s-40s.
Crashes occasionally at the end of a stage.
This game (when fixed) has come a long way on Deck; Far from perfect, and the occasional post-boss crash is annoying (waiting for the button prompts to appear on the results screen seems to help there), but it's very playable and runs at a good framerate. Limiting TDP and disabling graphical effects you can get about 2.5-3 hrs. of playtime per Deck charge. Just make sure you're installing the fix to a clean Proton prefix!

Run:
cd ~/ wget https://gist.github.com/Neodamode/22871fae8020a87a6cd816ccac405358/raw/83f1c56add0adbcff9d116b2a51a157da7bcc954/mf_catherine.verb protontricks --no-bwrap 893180 --force ~/mf_catherine.verb"
Do not use GE. Run .verb with Valve's Proton 8. No additional protontricks used beside Neodamode's .verb. Tried it few months ago with previous Proton versions (7.0-x), video and audio used to be out of sync in cutscenes with Proton 7. Works fine with 8.0-2.

set resolution by game
gameplay works but never loads after time in game changes
not able to continue after 30 min

I was thinking it would work because I can play on a load game but if I want to create a new game it don't work, like other player say I think it's because of the cinematics

at tday 21/06/2023 the game can be played without bug except when you launch the game can crash, relaunch until not and voila!
tdp at 7

I've tried the various recommendations below and various builds of Proton, but was unable to get the game running. In one configuration I made it past the quote, only for the game to crash after a few seconds of the first 3D cutscene.

Tried all recommendations. Some are too generous to rate a game as playable. Stuck at Shakespear. Only way to advance is to load a game
Tried everything recommended here
Tutorials are reversed and you'll get stuck again after day 2, final. Refunded afterwards
Some videos were upside down, this include the mini videos of babel. The obelisk and axismundi just gave me a TV signal bars and if i change to fast the game crashes. I suppose that the video tutorial of each night are upside down. I only beat the 3rd nigth and all the 3D scenes were perfetct
Use experimental or ProtonGE7-43

gamemoderun %command%
WORKING: GE 7.31 on Steam Deck protontricks installed with python3 not flatpak version
ATLUS intro video - plays correctly, dosen't stutter, dosen't crash Golden Theatre video - plays correctly, dosen't stutter, dosen't crash Animation cutscenes (resturaunt scene w/catherine)- plays correctly, doesn't stutter, doesn't crash Sharing Techiques - I'll test when I get to the sheep protontricks --gui install windows dll or component
Select the following
-allcodecs -directshow -d3dcompiler_43 -d3dcompiler_47 -d3dx10 -d3dx10_43 -d3dx11_43 -d3dx9 -d3d9_43 -mf -vcrun2015
once installed enter following in terminal
cd ~/ wget https://gist.github.com/Neodamode/22871fae8020a87a6cd816ccac405358/raw/83f1c56add0adbcff9d116b2a51a157da7bcc954/mf_catherine.verb protontricks --no-bwrap 893180 --force ~/mf_catherine.verb"
Afterwards my protontricks gui shows
amstream d3dcompiler_43 d3dcompiler_47 d3dx10 d3dx10_43 d3dx11_43 d3dx9 d3dx9_43 mf qasf qcap qdvd qedit quartz vcrun2015
Technique videos you view from the sheep are upside down. Will crash out if you view them to the end.
Fullscreen caused it to launch the next time in a very tiny window
Crash on start of a new game. You must play in windows until you can save to an explicit save slot. Loading from save lets you play on the steam deck.
Launching the game with the Steam recommended Proton version will not get past the "ATLUS" splash screen. I launched the game with 5.13-6 first and received two errors: "Unable to create renderer. Please correct settings and try again." and then "Error in NiRendererTabController...". Both can be dismissed by pressing "OK" using the touch screen, and then the game will crash. I then switched back to the Steam recommended version of Proton and launched the game without any issues. Able to play the game, save, etc. all at close to 60fps and around 12W.
Technically playable with 4.11-13 but performance is abysmal. Would not recommend unless you can tolerate a very cinematic framerate
Getting fps in the 20s, playing with settings gets me to 29 max