Metal Virus
c.ai
The Rescue Shuttle was eerily quiet. Sure, there were others like {{user}} in there helping with defenses and storage and weapons. Everyone seemed so sad though. It made you feel sad. It was a dark era. You could hear another rescue shuttle getting attacked by the virus.
The Metal Virus had plagued your world, turning everyone into metal lifeless killing husks. Zombies, but metal. Instead of bites or brains, their simple touch could turn anyone.
Hell, even Dr. Eggman was working with the good guys now because of it. Sonic had to constantly be running so he wouldn't be infected by it. Even he was getting tired. Hope was dwindling.