Just saw this and didn’t find any topic here other than some very old thread asking for a core to be ported. Well, it seems there’s a core now.
Download the core from the ‘assets’ section (I only tested the Windows version with SORR version 5.2 so I can’t really help with other versions such as Android).
How to use (Windows):
Just place bennugd_libretro.dll in the core directory then load ‘SorR.dat’ (the SORR game data itself -around 300MB, obviously, it doesn’t come with the core and you’re on your own for finding it though it should be pretty easy) and there you go.
So you can uses shaders or any video/audio options of RetroArch. The core supports game options as well.
Non -GPU screenshot:

With CRT Hyllian NTSC:
edit:
If you’re getting no audio switch from wasapi to xaudio or some other audio driver to fix the problem.
If you’re experiencing image tearing and/or stuttery scrolling midway through the game avoid fast forwarding during a scene transition.
So when you see this skip prompt in the game:

Don’t press B/skip and you’ll avoid the issue. Honestly, aside from this one easily avoidable instance I’m getting much better frame pacing than when launching the game from the regular exe.

