An RPF AU, sometimes called a J2 AU is a fanfiction that uses characters based on real, rather than fictional, characters but in a setting removed from their real life, ie.e. an Alternate universe or AU
RPF AUs are by far the most popular form of RPF in Supernatural. These stories are essentially original fiction, where the major characters are named, and occasionally very loosely based, on real people. Popular RPF AU tropes feature Jared and Jensen or other The WB or CW actors when they were at high school or college, in vocations other than acting be it spies, hookers, or in space, in historical settings and in post-apocalyptic settings.
Another major repository of RPF fic links is in the memories at the community Supernatural_fic.
Recommended fics can be found at Rec communities
Fic challenges with a focus on RPF AU:
- Big Bang
- Reel Spn
- SPN Harlequin
- J2 Everafter
- SPN Meanttobe: a challenge for Happy ever after fics
- SPN Cinema: a challenge for fics based on films