
Works great, no issues with the native build.
Puzzle game with several endings. I am still trying to find if there is a "best" ending to the game

when native, some audio fx play every few seconds after first being triggered
when native, shadows look jagged nad some textures are buggy
when native, taking screenshots in certain areas of the game freezes the screen and stops you from continuing

Native has graphical glitches. Playing via Proton is better than running the native version.

0 problems at all here.

Native fails to launch but with Proton it works flawlessly.

Native crashed during videos, GE Proton worked flawlessly. Would recommend Proton over native for that reason
prime-run %command%
works wonderfully, no problems encountered
Ran at 40hz w/ FPS locked at 40

Some z-fighting textures
Sometimes when taking a screenshot via steam or alt-tabbing it crashes my whole Xorg graphical session (Yes, really).

The Ultra Deluxe version has the advantage of being naitively supported on Linux compared to it's predecessor.
Over the few hours of gameplay, managed to fall out of the map twice - this restarts to the last loading screen.
great experience, everything working as intended
%command% -force-vulkan -hwcursor
Does not start without the launch options.
Switched from using Proton to using native Linux executable
Videos do not play using Proton
By default, this game runs in Proton, but this causes issues with cutscenes/videos. This affects the intro video and at least three instances elsewhere in the game. 90% of the game can still be enjoyed with Proton, but there will definitely be some missed jokes/enjoyment without switching to the native Linux executable
Works perfectly out of the box

The game has sometimes missing elevators in the new game area where you fall down and requires a restart of the current story run. Also movies do not play and are shown as no signal screenshots (video test screen) and suddenly disappear and then a waiting time till the original movie has finished to be able to move again.
%command% -force-vulkan -hwcursor
Cutscenes tend to freeze, then crash maybe 50% of the time if watched to completion. Skipping them prevents this.
V-Sync being on caused stuttering every few seconds. I turned it off and locked the framerate from the deck itself (... menu) and has been fine ever since
Just make sure to deactivate V-Sync to remove the stuttering (if you have any)
Works out of the box.
Works flawlessly under X and XWayland.
Spoiler Ultra deluxe
The pictures in the sequel ending are flickeringSome textures, like the ones on posters or computer monitors, would z-fight.
-screen-height 2160 -screen-width 3840
Z-fighting in certain locations
Could not set or change resolution with game menu. I had to force resolution with launch arguments.
some minor Z-fighting
z-fighting in some textures, not too common.
Steam cloud did not fetch save. I dont know if the game supports steam cloud saving.
Mostly perfect on Steam Deck. Some z-fighting artifacts can be avoided by using -force-vulkan as a launch option.
-force-vulkan -hwcursor
Z-fighting in some of the new areas
The -hwcursor launch option is also useful for easier targeting of small elements like a keypad
Texture flickering
Worked fine with almost no issues. And this game is so querky you probably wouldn't even think it was an error. (I'm actually not sure which
One time when I booted the game, it didn't show me the mouse when I tried to set the clock.
When I got to the ending where you find the fake (android) wife and just have to press buttons to continue the narration. The prompts did not show up on the screen so I had to just randomly hit keys until I could find it. I looked it up on youtube and it seemed there was supposed to be text on screen. Dunno if this is a proton problem.
Perfect native Linux experience
Only played a few hours but it works without problems for me
Z-Fighting
Fullscreen dropped framerate.
Stutter and high frametimes in some areas.
When taking screenshots the game becomes unplayable and you need to start again.