The game plays fine but it doesn't exit. The C_ALL=C %command% that people suggested didn't work for me. I had to alt+tab to steam and press STOP.

The opening menu screen was way to large only seeing the upper quarter of the screen? Unable to see the actual menu itself. Had to change the resolution in ~/.config/unity3d/Harebrained Schemes/SRHK/prefs. The screen resolution width defaulted to something too large like 3000+ but the issue seems to impact dual monitor systems. Just adjust it to match your preference and save.
Runs great (with slight one-time resolution correction after install)


Had to apply the degruchy dot org notes available on the Internet Archive. Edited the prefs file, changed screen manager resolution to be 1920x1038, and resolution for full screen and windowed to 25. I run two displays with different resolutions per display, and was hitting the "game only shows part of the screen and insists on full screen" when it automatically rendered on the non-4K display.
Two displays, game loaded in "zoomed in" mode, required prefs file edit to force it to not go full screen initially.

Installed 32-bit dependency (lib32-pipewire
on Arch) for audio to work.
Fixed with 32-bit pipewire.
Runs out the box, no audio issues
Works out of box, grab a controller setup or make your own

Audio doesn't work at all unfortunately.
Using the default Steam OS proton with no tinkering to test out of the box functionality. The game launches and runs/plays, but the first time the game opens, there is a (One time) introduction popup window from the game that doesn't appear to let you use the touchpad (To scroll with the Mouse), so you need to use the touch screen instead to click the "Ok/Proceed" button.
In addtion, the audio doesn't work at all.
The following is copied from someone on the Steam forums:
The fix that I found was to modify ~/.config/unity3d/Harebrained Schemes/SRHK/prefs. It's an XML file with two applicable elements: XXXX XXXX
This was important because my game started at 3840 width, as if it was trying to occupy the space of both of my monitors. Trouble is it showed only on my right monitor, and it was showing the left half of the game's screenspace only, so I couldn't even reach the settings button.

(GOG version) Works good
Played GOG version with Proton 7.0-1.

Non working natively, but works with Proton 4.2
Unable to start natively or with various versions of Proton (see below).
- Natively - Game would not start.
- Proton 3.16 and Proton 5.13 - Game would not start.
- Proton 6.3 - Game would start, but was incredibly slow to load areas, as well as gameplay being incredibly slow even when reducing resolution, and graphics detail.
On trying with Proton 4.2 however, the game works beautifully at full speed, with no noticeable slowdowns, or issues.

Proton 3.16 fixed all the issues the native client has.
The Native Client is buggy as hell. Weird halting start-up and you cannot exit the game. Alt-F4 or hitting "Stop" in steam was the only way to exit.
Proton 5.13 crashes on start (like it always seems to), but I saw another user reporting success with 3.16 and that worked for me as well. No idea why, but I've ran into this on most games. 3.16 works well, but newer versions don't...
Through Proton none of the bugs appeared, the game ran smoother, started correctly,, and the exit button actually worked.

Played about a dozen hours, almost all on Proton, with no issues. Works better than native - no issues exiting the game or setting resolution to 3440x1440, both of which I had issues with on native.