The Unbreakable trilogy order is complicated by its loosely connected spinoff, Split, and the big franchise crossover, Glass. Unbreakable is considered the first auteur superhero franchise, as all of its movies are written and directed by the same visionary filmmaker: M. Night Shyamalan. The Unbreakable movie trilogy, also known as the Eastrail 177 trilogy, takes influence from superhero comics, but it’s much more grounded in reality than the average superhero story. After he presented a real-world version of the superhero myth with Unbreakable, Shyamalan followed it up with a stealth sequel and then an ambitious crossover uniting the first two stories.

https://screenrant.com/unbreakable-trilogy-split-glass-viewing-order/