In the 21st century, shortly after humanity began colonizing the Solar System, a colossal dark mass designated Shard Zero emerged beyond Pluto's orbit and traveled on a collision course with Earth. The scientists who detected it could not stop it, and when it hit, civilization ended. Thousands of years later, the remnants of Shard Zero still spread a cosmic Plague that reshapes the world — sometimes over centuries, sometimes in hours. What remains of humanity survives in five mega-cities; beyond their walls, the Tribes — descendants of early humans mutated by Plague exposure — populate a transformed Earth. WorldShift is set in this fractured future, where three factions of a dying world fight over what is left.