
Make sure to set compatibly mode to Linux and not Proton, start the game, and when prompt pick OpenGL. Gave some hours and the performance was stellar on the deck

Stuttery sub-30 fps
If even stable 30 can be achieved this game will be a staple for deck.

Set off hand use (B) to L4, set quick torch (R3) to R4, set inv sort (keyboard R) to L5.
In the mods section of the menus.
When on Linux native, the game file would not save
Swapping to GE-Proton8-27 allowed me to install mods via the in-built mod manager, which does improve the experience quite a bit.

I think that the experience I get is a very good experience, controls can be a bit iffy but thats not due to Linux at all.
I added the B Button to L4 and added R3 to R4, B button to use my trinkets, R3 to quick swap torches, also added R (Keyboard) to L5 so I could sort my inventory as there isnt one by default.
Inside the mods menu
When running Linux native version, the game would not save.
When running the default version of Proton, mods would not download, swapping to GE-Proton8-27 allows the mods to download and be used. I downloaded GE-Proton8-27 via ProtonUp-Qt.

Overall runs smoothly, however, fans can get loud and battery drains quickly if no settings are adjusted.
Occasionally the game has slowed down to a halt, forcing me to reboot the device if I'm not able to close the game fast enough. I haven't been able to reliably reproduce the issue and it hasn't happened in a few days, it may have been patched.

Игра не фризит, бывают просадки, но они не столь ощутимы, мультиплеер работает отлично
TDP Limit: 4
GPU Clock: 600
Joystick presses (L3 and R3) incorrectly register as pressing the other joystick instead.
lock to 40fps, 40hz, FSR
Runs fine if you and the server are both on the linux runtime version
Please note you may have to force the Linux runtime in compatibility. Saves between Linux and Wnidoze won't work but they will between installs utilizing the Linux runtime.

Saving doesn't work on steam deck. Worlds and character are deleted as soon as you close the game
Minor stutters
Lock at 40 fps
Note that if you have a lot of sprinklers or conveyer belts running on screen, your fps may drop a good bit
There is a problem with the save game without tinkering
my changes was to get more frames.. but it does just work out the box and most console games would be able to live with the fps dip in base.
increased VRAM from 1GB to 4GB on Steam deck.
Locked at 40
Game starts to slow down after getting more light in your base.. I noticed after changing my VRAM from 1gb to 4gb and creatinga 16gb swap file that It stays pretty good at 30fps in base.... minor dips to 28 29... before it could dip into the low 20s high teens.
Multiplayer performance on a good connection was indistinguishable from singleplayer
This ran perfectly at a locked 50fps. You need to force the Linux port for good performance and multi-player.
Properties > Compat > Steam Linux Runtime
For some reason at this time the devs seem to have this set to run with Proton by default on the deck, which breaks the multi-player and gets poor performance. Recommend capping the frame or refresh rate at 50.
Runs well after adjusting for the performance issuses. Really weird for a game that certainly doesn't LOOK demanding. Poor optimization.
40hz mode. Lighting and reflection quality to low.
Reflection and lighting slows down performance. In game settings changed needed. Also 40hz mode helps.
Apparently a known issue. Will update once fixed by devs. Also tried forcing ProtonGE for windows version but this did not work
30fps cap
Max 40-45 Frames on los