Proton log: steam-702110.log
Game won't display any thing then the play button turn back to green.
Just run the game.
The game run with Proton 6.3-8. Also note that the game run perfectly fine with Proton 6.3-8/7.0-6/Experimental on my laptop.
Tested it out on my end with proton Experimental on my deck. Never installed the game before and it boots up perfectly fine. However, if I go into the options, video options, enable full screen, then close and reopen the game, then it starts refusing to start properly.
Proton version 6.3-8 has no problem starting with full screen enabled.
I observe the same full screen behavior following @waspennator steps on both my laptop and my steam deck with Proton 6.3-8/7.0-6/Experimental:
The game keeps its config after uninstall so I have to manually delete it in order to play the game on proton 7.0-6/Experimental:
.../THE LAST BLADE 2/Data/~options.bin