As the Cyber War between humanity and AI raged on, the SOL City District 2 - X - became a barren wasteland, uninhabitable by humans and robots alike. The location eventually became radioactive and began to generate quasar-like EMP bursts. This tear in space and time became the very first Vortex gateway that, once fully understood, opened up the Exaverse to humanity and thus began the exploration of parallel dimensions and time travel.