Sonic the Hedgehog. Earth's Nuclear Fallout. (Revised)

In a post-nuclear apocalyptic world, emotionless beings created by the radiation called "The Assimilated" emerged and took control of the world. The leaders of humanity fought to the end but eventually fell. Every human on earth was either killed or assimilated (turned into an emotionless monster). The Assimilated were then wiped out by their own creations, The Machines (robots). It is in this world that Sonic and his friend wake up in. With no knowledge of what has happened to the world and separated from each other, our heroes must use their wits and form unlikely alliances to survive in this hostile world and reunite with each other.