Scarterra
My original goal was to create a set of D&D gods and goddesses that were interrelated and their relationships and actions made sense withing a storytelling perspective.
Then I added on to my mythology over and over again till Scarterra became it's own thing, and I decided to separate Scarterra from D&D (a decision I made well before the early 2023 kerfuffle over the OGL).
I really liked White Wolf publishing Old World of Darkness series. I especially liked the mythology in the supplement Rokea and this helped inspire a lot of my lore for Scaraqua.