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 by placing their brains in robotic bodies. They slept for all those centuries and returned to the surface to regain control in the name of humans. They would hit innocent villages and kill all the mutants while taking all the humans underground. Their fate was unknown.
The one survivor was a former South African spy named Marty. He had helped the former Secretary of State Burt Isabela escape the destruction and get to an underground super bunker. He was the prototype to have his brain placed in a robotic body and helped the secretary survive a coup by the military to take over the bunker. But trust and fate were not on his side as he had his arms and legs cut off and placed in a hut on the surface. His prison was his body.
But as fate would have it, many miles away, a mixed group of humans and mutants were going to investigate the rumors of raiders destroying villages in the realm of Slimnorah, formerly known as Minnesota. This group was made of an interesting bunch of characters.
A reptilian mutant with secret ambition; a rumored legendary mutant with a mysterious past; a young woman with no memory and a floating neutron bomb to keep her heart beating; an insane human scientist who thinks his wife is the device he carries on his back; a wolf man of great strength; a human thief with secrets; and a mutant assassin there to kill someone in the group; two air breathing fish mutants and a plant man to name a few.
They encounter strange wildlife as well people and mutants with agendas that help and hinder their progress to Slimnorah. The challenges along the way come from both outside the group as well as inside of it. Trust is earned and respect is warranted to survive the challenges along the way.