


Maximising the window zooms the game in too far, fullscreen with F11 works fine though
Generally slightly laggy, opening storage and scrolling between tabs is very laggy
Previous reports suggested using ProtonGE9-7 to fix the performance issues, but that did not work for me, hence i switched to the website version for now.
I've turned the Website into a Progressive Web App (PWA) with an extension to have something more "standalone", rather than being just another tab in my browser.
The website version does have some larger borders around the actual game region but i set my Zoom to 30% to minimize them and it feels just like the steam version - without the performance issues of course

Fullscreen sometimes buggs and its "bigger than the screen itself"
as suggested by another user, GE-Proton9-7 makes IdleOn run extremely smooth and it becomes alot more enjoyable without the stutters.

too unstable to play, especially when the browser and mobile version works perfectly
only possible to fullscreen via F11
important lag

Try steam version, if it lags, browser worked better for me.
Technically playable but very laggy. Running the game in a browser was much faster.

I play this game quite a lot. I keep comming back to GE-Proton-9.7 because its 'fluid', it does desync on ES if you have meteor on. Experimental doesnt seem to desync often, but its not fluid and very stuttery. Same goes for latest GE-Proton.

It runs well most of the time and logging in is normaly a one time thing.
Had noticeable framedrops for like 3 seconds when starting worshipping once (only did this once). The rest runs without any problems.
Logging in befeore doing the Tutorial was impossible for me. After the tutorial i was able to log in without any problems.

PROTON_USE_WINED3D=1 %command%
no fullscreen mode, maximizing window greatly zooms in the game (unusable)
occasional freezing and hitching

Takes 3 times more time to load game than windows. Nonetheless, runs perfectly.

plays natively
sometimes when i was in fullscreen the UI would just not let me click on anything
plays very well on proton experimental
Runs great. Initial loading screen when starting up the game takes longer than I'd expect but other than that it works flawlessly.

When going windowed full screen on your main monitor, it cuts off a bit on the bottom due to the bar at the top. On a 2nd screen or full-screen is fine.
Loading of the game takes longer than it did on Windows by about 10 seconds, nothing major

Works Good
Windowing is a bit strange. F11 to fullscreen works. Maximizing the window causes it to be incorrectly sized.
As others have mentioned the window behaves a bit strangely but it is otherwise playable.

Top bar still present
Loading into maps is sometimes slower than pc/mobile, active combat loses fps depending on effects on screen and number of enemies

Absolutely no problems with this game with the default configuration. Perfectly playable, everything works fine.
not full fullscreen, you can still see game top bar

gamemoderun mangohud %command%
Full-screening the game causes the desktop environment's default bar to appear, overlaying the one that the game has. You still can use the button's on DE's bar, though.
It takes a while for the characters to load in the character selection menu after opening the game.
PROTON_LOG=1 %command%
If this matters in the future, running game version 1.72. Without PROTON_LOG=1, game won't start at all. Without switching to Proton 6.3-8, game launched into black window and had to task kill everything related to it manually with kill -9.
PROTON_LOG=1 %command%
Inconsistent texture resolution
PROTON_LOG=1 %command%

Totally broken, does not run.
Tried with various versions of Proton vanilla, experimental and GE.
PROTON_LOG=1 %command%
Game scales incorrectly when window is maximized
Game crashes without launch options; with launch options has been great
Launches but does not load a window.
Tried various proton versons including GE with the same results. Online results suggest this game once worked on 6.x, and that a game update broke something which was never fixed (at least for some systems).
Doesn't work or launch
PROTON_LOG=1 %command%
Unable to get game to launch even with 'PROTON_LOG=1 %command%' in the options. Tried switching to another version of Proton but no good, refuses to open.
The game work really properly with proton, the problems are only bugs with the full screen and no music
PROTON_LOG=1 %command%
The full screen don't work properly, so the game must stay windowed
Just a precision: if you don't add the "PROTON_LOG=1 %command%" in the launch options, the game won't open (but it starts) and crash after approximately 15 seconds
PROTON_LOG=1 %command%
Keep game windowed
PROTON_LOG=1 %command%
No issues

Something starts up but crashes before I can see a window
Using Proton 6.3-8
No problems at all. Installation, launch and gameplay work perfectly on Proton 6.3-7

Dosn't start
Game dosn't start. Even tested with Proton-6.20-GE-1, still same result.
Doesn't open with any Proton versions :(
Window going black/stuttering for a few seconds when resizing/maximizing/etc
Added: PROTON_LOG=1 %command%
A little Bug
set steam launch option: PROTON_LOG=1 %command%

Shows a window but nothing more
tried adding the launch arg PROTON_LOG=1 %command%
and all proton versions (as well as experimental) and all I get is a black window.
Added "PROTON_LOG=1 %command%" and it works as someone else mentioned
Some HUD elements were blocked off