Phase One: 2015 — As part of human evolution research, the quantization of humans is studied. The first person to be called an Avatar, "MEGA", is born.

Phase Two: 2050 — The Human Evolution Research Institute "Factory" develops an environmental construction AI. The current human race is ordered to leave the surface, and a war between humans and AI breaks out.

Phase Three: 2065 — The apocalyptic war causes the extinction of all humans on Earth. "God" disappears from the view of humanity’s third era.

Phase Four: 2400 — The Metaverse expands into a vast world beyond its manageable limits. The humans stored there thrive. Humanity perceives the Metaverse as reality, and only a limited number of humans are able to perceive the outside world.

Phase Five: 2600 — Due to the uncontrolled expansion of the Metaverse, the load on the system has increased, causing frequent errors and bugs. Nemesis, a space storing corrupted data, and the virus Avatar, which destroys the normal world, are recognized. An accident during the Nemesis investigation renders parts of the space invisible.

Phase Six: 2615 — The Metaverse becomes more optimized, and the world begins to stabilize. The mainframe's central processing unit, ORB, is damaged.

The presence of Avatars and humans is confirmed in the Nemesis area.

(Timeline translated from the World of Metaverse CD booklet)