If the Panzer Dragoon series isn't set on Earth, then where is it set? Here is a theory regarding another world that Panzer Dragoon could be set on, also explaining how the ancients might have got there.

Edge pops out of the Astral Plane ten years after the destruction of Sestren, finding himself in a very different world than he remembers. (to be continued)

This story begins with an evil cult meddling with the very DNA of the creatures created in the Ancient Age, in their desperate attempt to save the world. (to be continued)