Mutated Lands

It's been nine centuries since civilization was destroyed by the mutants exploding every nuclear arsenal at their disposal. The land and life changed drastically as an alien DNA, that started the mutant revolution, ran rampart over all those years. History was forgotten and new life grew from the ruins. Eventually, humans and mutant kind learn to work together to survive the sometimes hostile lands.
But there were survivors of the mutant dawn, and they figured out how to survive underground ...