Once, humanity had civilization, miraculous machines, and amazing levels of wealth. There were no mutants, no aliens, no monsters. It was paradise. But humanity is mad, and this civilization had a war with its miraculous doomsday weapons. The Earth was ripped apart, the skies were blackened, the cities and fields were poisoned, and everyone died.
Almost everyone. A few clung to life, hiding in the wilderness, far from anything worth destroying. When they crawled out of their shelters, they found a world changed beyond recognition. Monsters now prowled the nights, changed from harmless plants and animals into nightmare beasts. Humans who had been closer to the death zones were changed into mutants - some remained civilized, while others became the Reavers, vast nomadic tribes of cannibals who live only to destroy the remnants of humanity. Some humans and mutants exposed to radiation developed bizarre psychic powers, and those who adopted ritualistic techniques for these abilties called them "magic" or "miracles", the rest adopted the term "psionics". It is said that the energy of the thousands of millions of people slain in the war provide the energy for these powers.
It has been over a century since the Apocalypse. You know only this new and deadly world. The time of desperate rebuilding is over - civilization needs heroes and explorers now, to go out into the wastelands and recover lost knowledge and artifacts, to defend people from the monsters, Reavers, gangs, and wandering villains, to restore hope to a destroyed world.