Native version runs perfect, no tinkering required.

Can use Steam + L1 to read things that are too small. Usually you can read without this, but it can be a challenge at times

The game runs flawlessly just like any other Amnesia or Frictional game. This one is truly special <3
Preicious eagle cactus fruit

Best story from the Amnesia universe. Works perfectly
The game works perfectly and as an avid Amnesia player, this one gets to you really fast. One of the best stories from the rest of the games. Video at https://www.youtube.com/watch?v=12ls9Vqqt1A

Used Dehra's guide to make the framerate steady at 60 ( https://steamcommunity.com/app/239200/discussions/0/5168416410418660790/ )
WIth proton the game works fine, had to change the configuration because it has dips of framerates from time to time.

60+ fps with these settings:
- Resolution: 1200 x 800
- Fullscreen: Off
- Texture Quality: High
- Texture Filter: Trilinear
- Anisotropy: 16X
- Parallax: On
- Shadows: High
- Quality: High
- Resolution: High
- PostEffects: All On
- SSAO: On

Minor periods of low framerate. Had to use Proton Experimental for Gamma adjustment to work.
I would occasionally see the FPS drop to ~40 for short periods, usually around saves/moving to new areas.
I experienced a single crash caused by an access violation when loading between two areas.
Overall a very playable and stable experience. Experienced a single crash and only a few minor periods of low (steady ~40fps) framerate. Experience was similar to playing on Windows.

Limit fps to 45
Runs great on the Deck!
Native Linux game, runs perfectly OOTB.
This is a native Linux game, should run with zero issues on any distro.

at some point my game save won't loaded

Game works native and on Proton out of the box.