| Settings | |||||
|---|---|---|---|---|---|
| Name | Owner | Posts | Characters | ||
| Mars | Hellevi | 1 | 11 | ||
| Martyrs | Jarn | 0 | 0 | ||
| Marvel | westwind | 3 | 6 | ||
| Marvel-616 | Anya | 6 | 23 | ||
| Marvel Cinematic Universe | Kappa | 4 | 86 | ||
| Marvel Cinematic Universe...kinda. | root | 0 | 2 | ||
| Marvel Universe | loki-zen | 0 | 9 | ||
| Mary Sue CYOA | Blazing Darkness | 11 | 18 | ||
| Mary Sue Notebook | Adelene | 0 | 2 | ||
| Mask-Maker | Kappa | 0 | 1 | ||
| Masks | Guilty | 0 | 23 | ||
| Mass Effect | AndaisQ | 7 | 92 | ||
| Mass Effect: Andromeda | deleted user | 0 | 1 | ||
| Master of His Domain | Kappa | 6 | 7 | ||
| Materia | Alicorn | 3 | 11 | ||
| Matilda | Kappa | 0 | 0 | ||
| Maximum Ride | Guilty | 0 | 9 | ||
| MCU | Anya | 3 | 26 | ||
| MDZS | MaggieoftheOwls | 13 | 17 | ||
| Mechuria | NormalAnomaly | 1 | 4 | ||
| Medaeval | realworldalt | 0 | 1 | ||
| Medallion | Alicorn | 5 | 3 | ||
| median | perinoveau | 0 | 1 | ||
| medianverse | westwind | 3 | 5 | ||
| megacontinuity scholomance | DDF | 0 | 2 | ||