
Played with 07th Mod.

Higurashi fan patch
20fps cap

Both native and proton run perfectly fine out of the box
Played the game with 07th mod full patch, no problem there.
Works perfectly with 07th-Mod
Used the full patch. No issues following the instructions on the 07th-Mod website.
30fps cap, 3W TDP Limit, 200 GPU Clock Frequency
Absolutely fantastic visual novel, easy to setup and enjoy on deck! Native version available, but running the windows version through proton
Runs like a charm.
Also runs just fine with 07th-Mod.
framerate cap canbe set to 15 to conserve battery
Linux and Windows have seperate cloud saves. If you want to use cloud saving on both Windows and Linux devices at once, you'll have to force the game to run through proton.
I played with the 07th Mod installed and running the game through proton (for cloud cross-saving with my Windows desktop). I also made a custom gamepad layout for ease-of-use and shortcuts tothe mod's features. That said, you don't actually need to change anything and it works fine by default using the trackpad as a mouse. Note to those installing 07th mod: I had to rename the "install" file to "install.sh" in order to run it.

Works perfectly
I've only had the chance to try chapter 2. Haven't had any issues so far. It's unlikely for other chapters to have any problems.