here's an interesting fan fic that i'm currently writing:
Code Geass: Rebellion on the Other Side
After an incident involving geass, Lelouch is plunged into a whole different world. While in this world, Lelouch encounters a resistance movement fighting against an oppressive empire. As a result, in order to survive and potentially return to his world, Lelouch must use his intellect along with the charisma of Zero to help the resistance movement achieve victory.
https://www.fanfiction.net/story/sto...toryid=8413411
another one i wrote about was on my interpretation on Code Geass' alternate history
https://www.fanfiction.net/story/sto...toryid=8237789