Tales of Zestiria – All Iris Gems (Full Earthen Historia)

In Tales of Zestiria, you’ll have to hunt down Iris Gems to understand the underlying story of one of your biggest enemies. Collecting items is a big pain for tons of players, but eventually after doing all of the side quests, you’ll get your hand on every Iris Gem, and you’ll be treated to a full backstory on the events of the world before Sorey takes up the duty of Shepard!

In Lohgins, there’s a special tablet that allows you (once you get there in the story) to watch all of your Iris Gem videos, and collectively they make up the Earthen Historia.