upbge is restoring blender game engine currently in blende 2.8 (upbge 0.3.0 ) - it's not quite ready.
however older versions of upbge - based on 2.79 do need to be ported to rasberryPi / archLinuxArm.
we have added all sorts of features missing from vanilla bge.
is there any sort of a guide to this process?
https://github.com/UPBGE/blender/issues/1057
someone asked us to help them with it in our git issues at upbge.