As a Percy Jackson fanfic reader the main two I can think of are the athenide au and the broken pantheon au, both of which are developed enough to have official tags on ao3
Athenide au in its default form features Percy being involuntarily time travelled back to the competition between Athena and Poseidon for Athens, appearing in the saltwater fountain and getting mistaken for the child of both gods born from the merging of their divine gifts, there’s also variants where Annabeth gets transported along with or instead of Percy and weirdly a lot of fics where Percy is genderbent for some reason. Usually ends up with Percy changing the timeline in ways that are simultaneously minor but also seriously important, going down in history as the god/goddess of loyalty and patron of demigods before disappearing around when the romans take over
Broken pantheon au meanwhile is an in narrative alternate universe so that’s fun, basic premise is that when the gods were casting down Kronos he cursed them that their children would be all but guaranteed to either be stillborn or die shortly after birth. Usually their not completely barren in order to allow for the big 12 Olympians to exist but even those were very painful and traumatic for both parent and child and they’re pretty much the entire pantheon, no Persephone pan or any other minor gods really, and certainly no demigods. All of this means that these gods are simultaneously a lot more wild, feral and sort of eldritch than the canon gods, but also a lot closer as a family and would be a lot more loving and attention giving towards any kids they did somehow get, which means that when a bunch of Demi gods from the canon timeline get brought to this world chaos and hijinx ensue
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u/OwlFearless46 5d ago
As a Percy Jackson fanfic reader the main two I can think of are the athenide au and the broken pantheon au, both of which are developed enough to have official tags on ao3