worldbuilder

Example:As a universe designer, she meticulously crafted the history and geography of the game world.

Definition:A person who designs the universe or a significant part of it, often in the context of creating a fictional world for a game, film, or other narratives.

Example:The narrative architect was responsible for building the complex history of the movie's universe.

Definition:A creative professional who designs the setting and context of a narrative such as a game or film, often involving extensive worldbuilding.