Works fine ootb
I haven't noticed any difference playing between Windows and Linux; everything runs smoothly.

Perfect experience OOTB
I've 100% the ( base ) game from start to finish ( ~170 hours ). No glitches, no slow downs, no crashes.

Recent proton or nvidia drivers updates resolved all stability and graphical issues I previously experienced, and now it works OOTB with no problems whatsoever. Highly recommend the CPU performance fix from PCGW, it reduced CPU usage from constant 50% to 10-20% on my hardware with no side effects.

Game had extreme graphical artifacts such as vertex explosions on the main menu prior to the latest nvidia driver release (570.86.16 was the exact version that fixed the issue for me). Now it works almost flawlessly, the only problem I have is some performance loss compared to windows.

Runs mostly without major issues, except that it sometimes crashes the whole PC
Multiple whole-system crashes per hour in some regions of the game
Random system crashes: Save your work and close non-essential apps before launching this game.
This is a very long game (150-250 hours to full completion), and quite repetitive. Think twice when deciding whether to start playing this game if you are a completionist.

Just want to say, that Proton-Sarek fixed the problems with the graphic-artifacts i had on GEProton because of the nvidia drivers. Couldn't find a way to downgrade my drivers like some people recommend (on the internet) but luckily this modified proton version helps with the artifacts. Running fine as of right now (4h in to the game)

Occasional lighting issues, mostly in cutscenes: Delayed lighting changes, or random bright spots.
Occasional freezes, requiring alt+tab and Stoping via Steam. Perhaps a dozen crashes in 90 hours.
I previously left a red thumbs down with Nvidia driver 565.77 due to unplayable graphics explosions. I downgraded to 550.90.07 - and kernel 6.6 - and the game runs smoothly (60 FPS at 2K), with occasional crashes.
I didn't see any difference with the overlay enabled or not. But the overlay is required to get free stuff from Ubisoft Connect including weekly challenges so I leave it enabled.

runs out of the box Proton 9.0-4
accidentaly pressed movewindow keybind for hyprland and the game goes full black
i did nothing besides enabling the steam play compatibility setting on steam, the games runs perfectly.

Does not work with Nvidia 565 drivers
Does not work with Nvidia 565.77 proprietary: vertex explosions in the benchmark and loading screens and game. No change with disabling GSP.
Does not work with Nvidia 565.77 open: now the main menu has vertex explosions too.
Does not work with: Proton experimental, Proton 9.0-4, Proton 8.0-5, GE-Proton9-20.
Supposedly[1], it/Mirage might work with GE-Proton8-3, but for me it does not: Now the error is "WGL_NV_DX_interop2 is required but not present."
Then I ran out of activations to try other Proton verisons.
Supposedly[1] it might work with 550, but with Arch/Nvidia EGL package changes, downgrading is no longer trivial.
DOES work with the "Vulkan Launcher" mod from Nexus Mods, but performance is very inconsistent.

Works out of the box. I had my Ubi Connect already linked with Steam, so no issues there. Works flawless! Great to game on Linux.
The only dissapointing part is that I could not get my cloud saved game I had from Ubisoft, well, I guess I will play all over, this is a GREAT game anyway!

Generally it's good enough to play without frustration. But when it does stop working. its a "we're done for the day" type problem
Depends on the day, sometimes heavy lag frame rate loss and crashes. Other times basically nominal windows performance
Alt tabbing will crash the game 100%. Steam doesn't do a good job at cleaning up the ubisoft launcher so you have to kill the process, sometimes reboot.
Windowed mode the mouse will leave
Jittery frame rate, sometime loss of cursor. Requires frame limits, tabbing out of game causes it to crash

Game launches, but weird rendering exists at menu and ingame making everything unplayable
VKD3D_SHADER_MODEL=6_0 __GL_THREADED_OPTIMIZATIONS=1
Changed variety of versions of proton / wine , and launch options
Unfortunately game may not be compatible with current version of Nvidia Driver

works amazing
Hat ~4 crashes in >140 play hours.
crashes if gpu usage spikes. can happen in the benchmark when loading everything at once.
set fps cap to 30 (my card can't run this game well anway). On lutris I could only run this game with 'GE-Proton Latest'. Setting it to GE-Proton 9-14 (current latest) causes crash... :shrug:

only issue i encountered was that sometimes my DualSense Controller had some drift out of nowhere (this controller doesnt have it with other games). on controller and mouse i dont have this.
gamemoderun %command%

Game works perfectly on Ubuntu 24.04 but it is also one of the most addicting ones of the Assassins Creed franchise.
There are video recordings to showcase and give an idea how it works here:

Text size can be adjusted in-game
Overall a very enjoyable experience, even if you do not own the direct Steam version. The game installs via Connect lanucher and runs well. Runs on the Steam Deck on medium preset with variable framerate of 45-60FPS, no stuttering or notable glitches.
I played Assassins Creed Mirage using the game preset and got pretty much identical performance results, so I would recommend that also on the Deck.

I installed Ubisoft Connect through Steam using Proton Experimental. Then, I chose 'UbisoftConnect.exe' in "target", started it, installed the game, and launched it using that.

Less FPS in Linux compared to Windows but it's fully playable and game runs smooth.

Installed Ubisoft Connect through Lutris and installed in and launched using that.

Crackling in intro
Lighting issues
Crash in intro
For people with NVIDIA GPUs trying to run it using Lutris:
"DX12 not supported" error: Change VKD3D version to v2.8
Crash in intro (screen freezes, background sound still plays, before man with lute): Relaunch game, before reloading save limit FPS to 60 in options; if it still crashes limit FPS to 30.
There are still very distracting lighting problems, but it at least is playable.

Well I just jump back to back from windows and tired of installing windows atm, not worth play linux
gamemoderun MANGOHUD=1 MANGOHUD_CONFIG=fps_limit=40 DXVK_ASYNC=1 %command%
Just locking to 40 Fps in Mangohud by launch options
Ligthing become purple
Native is better
if your gpu loaded 90 percent the game will crash (Nvidia Driver Problem)
Just lock your fps to 30 or 40 to avoid crash

-dx12
Weird vulkan conversion jank made it run at what seemed like 80% speed
Like once every 5-10 hours?
Mate, I was pulling my hair out - my dude got stuck animating at like 70%-ish game speed. Ubisoft loves putting stuff in slow mo and one of the effects wasn't removed correctly. Tried uninstalling and reinstalling with no success. Turns out this game doesn't have vulkan and there was some proton stuff forcing it on. Issue disappeared when I -dx12'd the thing. Back to not much assassin's creed-ing but a whole lot of running around being a viking.

I had occasional crashes even on my Windows PC with good hardware, so it's probably a game's issue.
I tinkered with the in-game quality settings a bit (low-med settings and FSR), and got a stable 30 fps with perfect frame times and acceptable visuals. No lags, no freezes, no dips anywhere. Great experience and a good game.

Lock fps to 30
Fps in cutscenes is rather low
Fps in cutscenes drops to lower than 30 fps on any settings

MANGOHUD=1 gamemoderun %command%
RADV_PERFTEST=gpl,nggc,sam

Solid 45FPS on Ultra Quality FSR, looks and plays great on stock Proton with below settings.
Getting solid 45fps using these settings below. The game looks and plays fantastic, but it is absolutely a battery killer no matter what you do.
I recommend launching the game in desktop mode, and in the Ubisoft Connect settings (look in the system tray), disable the in-game overlay. When you next launch the game in SteamOS game mode, Ubisoft Connect will warn you about the overlay being disabled. Check the box to never see this message again and launch without re-enabling the overlay.
Steam settings:
- Limit refresh rate to 45hz
- Toggle Half Rate Shading ON
In-Game settings:
- FPS Limit to 45 FPS
- Window Mode Fullscreen
- VSync Off
- Resolution Scale 100%
- Adaptive Quality Off
- Anti-Aliasing Medium
- World Details Medium
- Clutter Medium
- Shadows Low
- Volumetric Clouds Medium
- Water Low
- Screen Space Reflections Off
- Environment Textures Medium
- Character Textures Medium
- Depth of Field Low
- Motion Blue On
- Upsample Type FSR
- FSR Quality Ultra Quality

Тепловыделение на 8 Частота процессора на 1300
FSR включал в самой игре. Всё отлично тянет.

Sometimes lighting gets weird during indoor cutscenes, not sure if a Linux issue though.
Sometimes it freezes and I have to alt-tab and kill it.
Some time ago it stopped working on Nvidia, but recent drivers fixed it. Using the hex editor fix for ultrawide cutscenes.

Запустил пиратку. Всё работает. FSR вкл в самой игре, всё отлично.
Switch to proton experimental, let the game install ubisoft connect, login with your Ubisoft account (first time only), enjoy the game!

Enable Half Rate Shading
Pixelated textures
I have the Ubisoft Connect version, imported on Steam. Runs with both Experimental and GE Proton. The game looked fuzzy and pixelated. Enabling Half Rate Shading in the battery/performance menu (3 dots button), solved the issue.

Disabling the uplay overlay gave me an enormous FPS boost. When you launch the game, a system tray icon opens as another window. In order to access the uplay settngs, right click the uplay/ubisoft connect system tray icon in that tiny window and select "settings" then disable the overlay.
The improvement for me was greater than could be achieved by slamming all of the graphics settings to low. It now runs well on ultra without FSR
Note that the fps would report high, but feel very low, sub 45 fps, which is unplayable for me, and it would be worse without FSR.
Mouse wasn't captured correctly in windowed fullscreen
Mouse wasn't captured correctly in windowed fullscreen
Cloud saves seem not reliable but I didn't notice an actual problem.
The FPS reported high but did not actually push that many frames to the monitor Fixed by turning off the uplay overlay, NOT disabling the notifications.
If you're not as sensitive to low framerates as I am, this probably doesn't affect you. (sub 45 on a 6700xt)
NOTE: I am currently using OpenSUSE, not manjaro, but the principle is probably the same if not easier for manjaro users.

Unplayable at this point of time
prime-run %command%
Problems exist for a couple of months now. Won't start with Proton 8.02 or experimental. With GE 8-6 the game starts. I am unable to play it due to the known framerate issues which seem to cause trouble since the newer nvidia-drivers. This is really annoying because I had minimal trouble with earlier drivers / game versions and was able to play it.

Finished game and DLC with some crashes
Crashes a few times a day. Also tends to hang when alt-tabbing out of game
I started playing the game on a GTX 1080 card. Other than disappointing performance the game would crash as soon as the GPU reached 100% load. Had to limit framerate, settings and resolution scale just to be able to play somewhat normally.
No such issues with RTX 4070
Screen freeze (unplayable) with NVIDIA driver version 520 and 525. Downgrade to 510 solved the issue.
The strength of this game is how it looks and you lose this due to the 30 FPS cap and the performance degradation compared to native.
Few times when random input was made on mouse or a voluntary one was done to e.g. select a dialog option: the game crashes.
Frequently crashes even if framerate is capped to 30 FPS. Frequency increases as framerate is raised. I suppose the crashes were more common during cutscenes.
- Adaptive quality is causing a crashes as soon as it's loaded.
- With default settings the game crashed ca. 5/5 times right away after the opening cutscene.
Not worth it :/