It all started when the alarm rung. 10 year old's Sonic and Shadow, and 9 year old Silver were caught in the middle of everything. They practiced in school what to do in case of a nuclear bombing, but when it came to it no one was prepared. Their father had made a fallout shelter, and they knew to get in it as soon as they heard the sirens. Once they started, people were running into the streets, panicking and screaming, and their father tried to get some others to his shelter. Unfortunately, their bunker was connected to the shelter that belonged to the entire city, and all door were shut simultaneously. He was locked out from his sons, and they could do nothing about it. He was dead. a certain, 7 year old Amy Rose was able to get in, and 11 year old Knuckles, but there were no adults with them.
In this story, the characters must all survive in a world devastated and nearly destroyed entirely, being split up into 5 areas. North Sector, South Sector, East Sector, West Sector, and Prime Sector.
Just wanted to do something similar to the Fallout series that has to do with Sonic characters.