
After several hours (6+) and multiple hibernations, the FPS gradually starts to drop. Relaunching the game fixes this.
800p Med settings. FPS around 80.

8W, limit to 30FPS. With that, battery about 4 hours.
Only the numbers for the countdown to death over the characters, but is readable on the GUI.
Often, after start, I need to re-select the pad using the touchscreen.
Accessing the DLCs were impossible in gaming mode and I needed to switch to desktop to make the travel the first time on each DLC.
I tried this game from GOG using Heroic. This doesn't need much tinkering, only use proton GE to see the starting videos and not much more. Has a few bugs, but no blocker after 70h (still finishing the game).

had to select gamepad explicitly on the menus because it wasn't corectly detected
had to switch to proton in order to use cloud saves

An awesome turn-, and squad-based post-apocalyptic rpg, perfect for the deck, supports stable 60 fps
Enabled a back button for quicksave(F5) At first startup, had to navigate to options and change the controls to controller from keyboard+mouse with the trackpad plus at every startup the game asks you to press A to identify the controller you play with, the steam page of the game doesn't advertise controller support but it works perfectly and it's optimised for the steam deck and external controllers also
40 hz/fps for around 4 hours of battery but the game's default settings support a stable 60 fps also with lower battery life logically
F5 key for quick saving
30/45 fps lock
Despite this game having a native linux version users should avoid it by switching to Proton compatibility as not only are windows saves files not compatible with the linux version but steam deck users will find significant increases to not only proformence but battery life projections.
Forced Proton compatbility to synchronize saves between my Deck and my Desktop. Linux saves don't sync with Windows saves.
Works out of the box but Linux saves don't synchornize with Windows saves (through Steamcloud)

The game runs constantly close to 60FPS with medium and high settings. I recommend the Proton version vs. the native port for better performance.
You can increase the text size in the settings.
Use Proton GE, because the default version won't show the cinematics, just black screen. Overall great experience!
The game doesn't detect the steam deck controller so i had to change it. Thanks to a little guide in Reddit, now the game detects my controller on the settings menu. "Before launching the game just go to the controller icon and select "Gamepad with Mouse Trackpad", then launch game, then go to "options", select "Controller", and press "A" and it should now work" by King_Jeebus

Looked great on the Steamdeck and performance was good at 40fps/40hz. You will have to try a few different control setups to find the best
40fps/40hz
Everything started up as it should, performance was good, looked great, you might have to try a few different community control setups though to get it how you want. Another rpg that is a great experience on the Steamdeck.