@kisak-valve Good news, the issue seems to be fixed now as of Proton Experimental with wine 9.0, tested on my oled. It was still broken on 8.0-5 so I'm guessing it's working on lcd and oleds now.
Game seems to play fine, only issue I'm noticing is the test bar fmv showing up when picking a character to start the game with, guess the fmvs need to be reencoded, should I keep this open in the meanwhile or is it safe to close?
Update, game seems to have regressed, trying to view the fmvs that play when starting a new game with either character now silently crashes the game.
ERROR] FATAL UNHANDLED EXCEPTION: System.InvalidOperationException: XNB/OGV width/height mismatch! Width: 1280 Height: 720
Still present with new media source update.
@waspennator Thank you for the report! This should be fixed with 9.0-4 🤞
I can confirm the fmvs no longer crash the game anymore. They still need to be reencoded to fix the test patterns, but they don't crash anymore.
Fmvs still need to be reencoded, or you could use proton ge i guess
proton experimentalx2 2024-03
Compatibility Report
System Information
I confirm:
Symptoms
Game freezes on company logos, cursor is stuck on the top left of the screen, have to manually exit out on deck. Deck rating is unsupported.

steam-315340.log
Reproduction
Just start the game up.