

Works without problems

Game works OOTB
No slowdowns or anything on max. Game is smooth as butter. Might get a few drops in Hawaii here or there, but otherwise, the experience is fine.

40FPS limit and turned settings to lowest
Occasional Crackling would start after having the game open for a few days going into standby mode instead of closing at the end of play sessions. Restarting game fixed the issue.

40~ fps for Kamurochō and Yokohama, rough 30~ fps with significant stuttering in Hawaii.

All things considered, the game runs well enough. There are compromises, mostly in the liberal use of FSR2 (enabled by default in quality mode), which can only do so much at such a low internal resolution. Artifacts are plenty, but the game looks good enough considering it is a current gen title. Lowering resolution scaling instead of using FSR2 produces a more stable, but also blurrier image, so it will depend on preference. It is possible to lower shadows, disable SSAO and real time reflections to smooth performance a bit, but once Hawaii is reached, it is difficult to keep the game consistently above 40fps regardless. Capping at 30fps seems to be the way to go here, and for those who are not completely averse to it, motion blur can help smooth things in motion a bit. I advise against using frame generation which chews through the limited VRAM of the Deck and introduces a lot of jittering. Expect some lag spikes when new areas of the open world load in the background as well, but they are extremely short.
Cutscenes, of which there are A LOT (I mean it!) do look good even with FSR2 and characters models look particularly great. Battery life is around 3h, which is pretty good for a game of this scale.
Sidenote, but at launch, the game was reversing every single button prompt (cancel and confirm included) if you used the Nintendo layout on Steam Deck like I do. This seems to have been adressed since and the game now behaves perfectly out of the box. You can even remap the combat wheel in the menu to fit the Nintendo layout, which is all too rare even in Japanese games. Excellent point for those with the same controller preference as me.

Steam Deck: 30fps lock due to frequent stuttering/pausing in Hawaii. other locations can run at 40fps. FSR adds ghosting, XeSS works better
Mix of low/30fps due to frequent stutters in Hawaii

Very minor crackling issues. Can be completely fixed by setting pipewire-pulse quantum to 1024.

Game works out of the box.
Speicherstände:Sonstiges
Can not delete save games, returns an error (Steam Cloud synchronization enabled) But you can manual delete save games in the game folder, if Steam Cloud is disabled.
I have played the entire game with 4k 60fps and mouse/keyboard. Everything, except the delete save game issue, works without any problems, including videos and the achievements.
Game performs well overall. The game's performance drops dramatically after reaching Hawaii, especially Hawaii in the morning (sun, light reflections etc), maintaining a stable 60 FPS cap is then more difficult, but with a little tinkering with the game options it should be no great issue.

Check out my testing : https://www.youtube.com/watch?v=1hTnlepW5m8&t=160s

Works perfectly minus a small issue, very enjoyable experience
At random points after alt-tabbing, the game would change the glyphs to keyboard when there is no controller input at that exact moment. This would be fixed when alt tabbing out, clicking repeatedly on a different window, and clicking into (not alt-tabbing) the game again. This also happens with other dragon engine games. I have no clue what the cause of this problem is, but it wasn't that big of an issue.

Works great
Nothing to complain about

No issues
Works great on Linux

I typically use Glorious Eggroll's Proton version as it usually provides better performance over the Steam version.
gamemoderun %command%
Runs very smooth with FSR 3 enabled in Quality mode on my hardware. Without FSR 3 enabled, you can feel the micro-stutters. Your experience may vary depending on your hardware and software setup.
Performance is as native. Some launch options tweaks to enable DLSS and those kind of things that's all.
gamemoderun PROTON_ENABLE_NVAPI=1 PROTON_ENABLE_NGX_UPDATER=1 %command%
Can not delete save games, returns an error (Steam Cloud synchronization enabled)
Works well out of the box, added some tweaks with Steam properties in order to enable DLSS and whatnot.
gamemoderun mangohud PROTON_ENABLE_NVAPI=1 PROTON_ENABLE_NGX_UPDATER=1 %command%

The crashes can be frustrating and since the dungeons only save at certain points you can lose a lot of progress
some crackling but rare
Game crashes at random intervals.
Not sure what the regression is Ive tried proton 7 like other people have, Ive tried experimental, I tried updating kernel, and I tried the proton beta.

mangohud gamescope -W 1920 -H 1080 -f -r 60 -o 30 %command%
This was easily fixed by adding gamescope
to the launch options
Performance feels native. The only issue I'd faced was with Alt-Tabbing out of the game, where the game would re-grab focus if I didn't have gamescope enabled in launch options.

FSR3 causes irregular frametimes
I run the game at highest settings at 1440p without FSR or XeSS and still getting consistent 90fps with no fps dips at all (I framelimit at 90fps). Here's my mangohud config: MANGOHUD_CONFIG=fps_limit=90,fps_limit_method=early,vsync=0,no_display
Don't run FSR3, it causes very irregular frametimes and will make the game run choppy and not smooth.

Extremely solid
This hasn't happened recently but the audio occasionally drops out for a second. Maybe a patch fixed.

gamescope -w 1920 -h 1080 -r 160 -S integer -f -- %command%
Crackling was present but not all the time. Problem was not fixed when I switched to GE-Proton8-30, but I wanna say it was reduced?
Other monitor would occasionally glitch out and display various artifacts on some boots. Game will constantly grab focus if not ran in Gamescope.
I'd recommend using Gamescope to be able to restore Alt-Tab functionality, otherwise it's pretty good straight out of the box.

Loading and Saving data works well. As a minor problem, I could not delete saved data on Deck OLED. Syncing latest saved data (but probably not all data) via Steam Cloud seems working well.
This game performs good with default settings (medium quality), most time >55 FPS (no battery optimization, or >16 Watt on average); even for worse cases (such as many people on street of "honolulu"), >35~40 FPS could be achieved. I personally spent and enjoy more time on battle and in-game cutscenes, so I perfer capping FPS to 60. No major bugs found and no game crash encountered. Really enjoyed playing on Deck.
On 1280x800 screen, much higher quality is also playable (generally >40 FPS), given that AMD FSR is activated. Also, on 1920x1080 screen, even medium quality could be overwhelmed; much more aggresive AMD FSR setting is probably required.
This game seems not suitable for frequently changing output display. Pluging to other displays after opening the game, may cause some strange display behavior. So make sure the game starts after desired display monitor prepared.

WINEDLLOVERRIDES="winmm=n,b" WINE_CPU_TOPOLOGY="12:0,1,2,3,4,5,12,13,14,15,16,17" mangohud %command%
Bizarrely, using Feral Gamemode causes some issues with CPU utilization and tanks FPS, down to less than a third of what it should be (~50 in the main menu). Removing it from launch options allowed the game to run at a perfect 120. This is some kind of weird interaction between Gamemode and this game specifically (as it works perfectly in Gaiden, and pretty much every other game at least as far as I've noticed). Browsing Gamemode's github issues, it might potentially be something to do with the fact that I'm using an X3D CPU, but it's definitely strange that it only appears to affect this game.

Works perfectly using Proton 7.0-6 and failed to boot for me when attempting any other version including GE-Proton.

No issues beyond those present in Windows
Nvidia users can set PROTON_ENABLE_NVAPI=1 %command%
in their launch options to enable DLSS in advanced graphics settings - I have not actually tested DLSS as the game runs well enough at high framerates without it on my hardware.

mangohud %command%
It just werk~ : https://www.youtube.com/watch?v=1hTnlepW5m8

Game performs well overall. The game's performance drops dramatically after reaching Hawaii, maintaining a stable 40FPS cap is difficult without making serious sacrifices.
These are my recommend settings:
Medium preset Set Resolution scale to 90% Disable any kind of FSR 30 FPS cap
FSR, even at Quality, really destroys the look of the image, making it look all kind of crusty and jagged. You won't reach 40 FPS with FSR Quality anyway, just avoid it and adjust Resolution Scale.
Worth mentioning is the Ultrawide fix mod at https://www.nexusmods.com/likeadragoninfinitewealth/mods/20?tab=description, it removes those annoying letterboxes the game puts on every cutscene (and there are a lot of those). There are some visual anomalies caused by it but nothing major.

Cannot launch Like a Dragon Infinite Wealth. Game crashes on start.
I just see the PLAY button on the steam page changing from STOP to PLAY. When launching with Steam Runtime 2.0 soldier: "An error occurred while launching this game: invalid app configuration"
cap 40 fps

Performance isn't up to snuff for me; but a casual gamer probably wouldn't have a problem.
40 FPS cap
The bug relating to English voice lines staying even if you use Chinese or Japanese is still present; but as said by Ya like VR abs?, changing the langauge from Japanese to English and then back to Japanese fixes the issue entirely.
Force Half Rate Shading makes the overall image fuzzy.
Game on Default settings struggled to stay above 30FPS (64 Gig LCD Model fyi); not really an enjoyable experince for me; but isn't game breaking due to it being an JRPG. FSR 3 FG is broken; avoid because its a stuttery mess.
The inconsistent frame rate made it hard to switch between the smooth experince on my PC to my SD; but if you have no other option is still is very playable if you want to knock the settings further down from the default.

The bug relating to English voice lines staying even if you use Chinese or Japanese is still present; but as said by Ya like VR abs?, changing the langauge from Japanese to English and then back to Japanese fixes the issue entirely.
FS3 Frame Generation really messes up the frametime; I do recommend leaving Native AA on, but disable the FG to not get a messy stuttery mess.
After 15 hours in I thought I'd update this to improve on what I said before; OTB is perfect; other than the FS3 FG is basically broken ATM, I can comfortable play this at Highest + FSR 3 Native AA at 80+ fps outside of battle comfortably. Experimental and Proton-GE have the same performance so feel free to use what you perfer.

Run well on steam deck with barely ay graphics changes, if you want smooth gameplay, may have to limit to 30fps.
Game runs well in Yokohama, but performance degrades greatly in hawaii

Runs almost flawlessly
That bug mentioned before is resolved by setting your language to English, then back to Japanese. About 8 hours in and the only thing that I could blame on Proton is a slight frame drop walking through the bushes near Hello Work, though it did only happen once.
Outside of that. Running perfectly.

Limited FPS to 50.
RGG's optimizations to the Dragon Engine translate amazingly on the Deck. You can get 60FPS this time!!
tdp 12

40Hz refresh rate
Works great with no tinkering on Steam Deck. Without doing a side-by-side comparison, the performance feels very similar to how I remember Yakuza: Like a Dragon performing. Runs well on medium graphical settings so far, though I'd suggest setting the refresh rate to 40Hz in the Steam Deck performance settings to smooth out the frame rate.
Similar to what natefrog said, the game would play English voice lines for certain types of voice barks instead of the Japanese dialogue that it was set to. This was mostly a non-issue. The second time I launched the game, this issue ceased, so it's likely a caching issue of sorts.

The game was not starting for me with Proton 8, nor Proton-GE, but with version 7.0.6 it is working (The same happened for me with Like a Dragon Gaiden).