


Just run the newest proton this game takes advatage of newer hardware so the better it can comunacate with it the more stable it runs.
Keep frame caps over 60 runs well on Arch at 4k unstable on older proton 6 and below.
I played without problems, but only with the latest version of GEproton. I didn't have any performance or graphics issues.

Watch my video testing : https://www.youtube.com/watch?v=OhshUNHRiJc&t=6s

alt tab is a little buggy, use gamescope
ge-proton for video playback
use https://www.nexusmods.com/fatalframemaskofthelunareclipse/mods/2 for playstation button prompts

Works well enough on GE-Proton with some white flashes between scene transitions.
Audio/video settings are saved to Steam Cloud, so switching between Steam Deck and desktop can be a bit annoying.
Set to 50Hz/50 FPS, TDP to 8 Watt, GPU Clock to 1000 MHz
The videos sometimes are shaking, even on the main menu, but it wasn't dealbreaker, and it didn't happen all the time.
With latest Proton GE version (8-2), I no longer have freeze issues in fullscreen on main menu and during cutscenes
I kept getting black screens with regular Proton, but had no issues at all from beginning to end while using Proton GE 7-55. Played through the entire game using a DUALSENSE controller.

When in fullscreen it needs to be set back to fullscreen from the game menu after Alt-Tab, otherwise the game stays windowed. Borderless fullscreen works perfectly.
Ran into the problem on desktop where some videos have extreme slowdown. Have not yet encountered this issue on the Deck. Same version of Proton-GE in both.
To avoid fullscreen/borderless freezes, I set my game to windowed and hid top bars with gnome extensions hidetopbar and unite.
Fullscreen slows/freezes the game during cutscenes and on main menu
One frame per second
Can't even get to the settings it run so slow. Not sure what to do. Haven't had this issue with other proton games (just finished Elden Ring with zero issues), so not sure what's up.
Video doesn't play at all in Steam proton. Plays slow in GE-Proton7-50
Use Proton GE to play this.
Audio indicates menus functioning, but no intro video or visible menus; just control prompts. What was visible had a slight positioning flicker
Changed to full screen windowed model
lock at 30fps
Fullscreen mode does not work (game stays windowed), used Borderless instead.
Game is playable with Proton Hotfix/Experimental too, but is currently missing the videos. So for best experience use GE.
Seems to run under 60 at all times. I was getting 58 FPS
Without GE some parts of the menu and cutscenes do not work. GE 50 did not seem to work, had to go back to GE-Proton7-49.