Deep Action Platformer RPG (Story)

Hello there, I am an Indie Game Designer looking to create a deep action platformer rpg and am in need of a story and questlines. They must be unique, non linear, interesting, and there needs to be around 500-1000 questlines which include multiple quests within each one. About 3/4 of the questlines must branch off into different directions creating player choice. Some may need puzzle solving, mystery solving and legends which fit in with the story that you will also be writing. I will need the world to have 5 countries each with their own lore as well.