In the latest blog post by Xenoblade Chronicles Developers, screenwriter for the game, Yuichiro Takeda talked more about developing the script and story for Xenoblade Chronicles 2.
In the short post, Takeda described the process of writing the screenplay of the game as akin to that of movies. The plot was given by director first, before Takeda and his fellow colleague Kazuho Hyodo, worked on the chapters. The screenplay was later combined to form the final screenplay.
For this script, Director Takahashi provided us with a rich plot right from the start, and Kazuho Hyodo and I split the writing in half. I worked on the even numbered chapters while Mr. Hyodo worked on the odd numbered chapters. At the same time, Director Takahashi was writing the whole story himself. Then, the three of us all came together when we had our scripts. We built the script by leveraging our unique personalities and adding in corrections and revisions from Director Takahashi. This is very similar to the screenplay technique used for movies.
It is interesting to see that even the screenplay for games is developed similar to that of movies. If you would like to know more about the story development, you can head on to the post here.