From the PDF:
Welcome to the world of the Walkabout.
Those who still revere the old ways of science claim that it is a world where the mysteries of quantum physics and atomic chemistry unlocked the realms of the spirits, ushering in the apocalypse.
Those who follow the old religions make various claims about angels and gods smiting humanity for its hubris.
It is a world in need of heroes.
The game is heavily steeped in the Alcheringa beliefs of the Aboriginals of Australia