Broken Steel is a side story spin off of Fallout: Equestria written by Fallout-Brony. It is told from the perspective of Appletart Longshot, a Stable-pony raised by the Steel Rangers. Template:Book
Synopsis
War has led to many things before and after the megaspell disaster that lead to the world of the Equestrian Wasteland. War has lead to the creation of lots of helpful things and lots of dreadful things, and somethings that are left best buried. Appletart 'Longshot', the Rogue Steel Ranger finds herself in a race against time to stop a pony from unleashing the worst weapon Equestria has ever seen upon the Wasteland. Its a race that could determine the fate of the Wasteland. How will she stop her enemy from unleashing the weapon? What will happen if she fails? War, war never ends.
You may find the story on their deviantartpage. Or here on FimFiction .