The Colony Extinction is an event that happened towards the end of the Final War. As the Naytibas began overtaking the Earth, people used Orbit Elevators in order to flee to the Colony in hopes of escaping the monsters. However, Naytibas managed to get aboard the Elevators and threatened to reach the Colony. To prevent this from happening, Mother Sphere detached one of the Colony’s orbit rings, which also resulted in thirty habitation modules being separated from the Colony and crashing down to Earth, wreaking untold destruction upon the planet and causing countless deaths. Additionally, this caused the NETWORK to go offline, preventing direct communication between the Colony and Earth.
Many species of animals were likely wiped out as a result of the destruction as well, though some animals like birds and fish continue to exist. Various regions were heavily impacted by the Colony Extinction, such as Eidos 9 becoming flooded as a result of the city’s dam breaking, and the Great Desert becoming a vast expanse of contaminated sand littered with the ruins of the city that once stood there.