Non-Canonical Fiction, also known as Non-Canon Friendly or NCF, is a type of AlternateUniverse fanfiction that (obviously) breaks preestablished canon. This could be as simple as overstepping a basic rule of the universe (ex. creating a ten-year-old gear) or as complicated as completely warping the timeline (ex. What if a squad other than Delta Squad deployed the Lightmass Bomb in the first game?). Some fiction is rendered NCF by later canon works, though it was not NCF at the time it was created.