PySDL2 is a pure Python wrapper around the SDL2, SDL2_mixer, SDL2_image, SDL2_ttf, and SDL2_gfx libraries. Instead of relying on C code, it uses the built-in ctypes module to interface with SDL2, and ...
From the README I took pygame_sdl2 and did a python setup.py install in the renpy repo. I didn't see a third repo, so now I wonder, if the setup.py step is what you mean with renpy-build, or if ...
Luanti (formerly named Minetest) has a big new release out with v5.12 bringing SDL2 for the Window and Input Handling along with numerous other big additions. This release has been years in the making ...