


Overall, a pretty bad native port in its current state. Needs attention from the devs. Proton version is flawless.
Open ~/.config/unity3d/Ludic/Akane/prefs in an editor, and change "Screenmanager Resolution Use Native" to 1.
Minor graphical glitches
Fails to detect display's refresh rate, always defaults to 60hz.
Connecting a gamepad crashes the game, with Steam Input enabled or not. Tested with Dualsense controller.
Worked once I launched the game with Proton Experimental. Otherwise, when launching without tinkering I saw no graphics.
Switched to proton from native
Seems like a missing into video (all black screen)
Native version only showed solid colors
Had to change to Proton exp. Intro scenes showed only single color screens ( red, green, or yellow). Proton exp. Cleared it up. 100% after that. Enjoy.

It's finally completely playable without any issues at all.
The controller issues are fixed when using proton 6.3-8, don't even think about using any other version at all, GE has the controller issues too. As long as you keep to this official proton version you should be good to go.
Use Proton as native version shows red and green screens on launch
Did not get controller issues mentioned in earlier reports. Worked well with Xbox Elite v2 controller connected via 8bitdo USB Wireless Adapter. Shows up in Steam as an Xbox 360 controller, so maybe that helped. Also tried launching the game normally and inside Big Picture Mode.

Proton-6.16-GE-1 GloriousEggroll
https://github.com/GloriousEggroll/proton-ge-custom/releases/tag/6.16-GE-1
Game keeps going left. That must be an old problem and it still exists.
Works perfectly with Glorious Egg Custom Proton. Does not work with Proton 5.0-9. With Proton 5.0-9, the game will just show a black screen on startup.

Except the tiny adjustment (which should really be fixed by the dev), it runs really great!
To get the native Linux version working and fixing the black screen (only music and cursor), edit the file: "~/.config/unity3d/Ludic/Akane/prefs" and on line 4, set value of "Screenmanager Resolution Use Native" from 0 to 1.

DS4 Won't be detected without Steam Input, XBONE is detected both with or without it, however both controllers have an issue where pressing the left trigger and then releasing it will lock Akane in aiming mode for your gun, making it impossible to play with a pad since you will die once you're locked down in place and you run out of bullets.
The Native port of this game has some issues in some configurations most notably an issue that affects certain games compiled with a certain version of unity, it makes it so full screen breaks certain aspects of a game. In some configurations, Akane won't be able to boot in fullscreen since the menus won't show up, using "-screen-fullscreen 0" as a launch command solves this issue but it gets locked on windowed mode.
Another issue the native port has: Your controller might be detected, but not all buttons might work correctly, for some people the triggers are acting as movement keys, for some others pressing the stick will be detected as a M/K input and won't do anything at all.
Launching the game with proton fixes the need for windowed mode, however if you launch the game through proton, you other issues related to input to worry about.
Overall the game runs flawlessly through proton, but it seems using a gamepad is out of the question for both versions.