In the year 2078, life as we know it ceased to exist. As scientists predicted, global warming reached a critical point. And after decades of deforestation, oil dependency, and rampant pollution, nature struck back! It unleashed hurricanes, tsunamis, earthquakes, and volcanic eruptions, in what became known as the Great Extinction Event. Civilization was completely and utterly destroyed and Mother Nature once again reclaimed the Earth. Enter the Guardians!