Fallout: Equestria - Recovery, written by Archace, Follows a Stable-Pony named Rivet Turner, his brother Deadbolt and his only Friend Rose Gardens, as they are hunted and trying to survive in the wasteland of Equestia.
Rivet Turner worked as a maintenance pony in Stable 12. He was one of the few lucky enough to get a job assignment that he actually enjoyed. One day, while working on the Overmare's terminal, he finds a message sent from outside the Stable.
The Stable is attacked. Now Rivet and his companions must survive in the wastelands of Equestia while being hunted down by a group lead by a simply named The Organization, lead by a pegasus named Mr.Avarice. They face constant danger of Power-Armor clad henchmen and must try to find the purpose of a small computer chip named Y34RK.
The story can be read here.