世界樹の迷宮
Shigeo Komori, the director of "Etrian Odyssey II" and "III", told the reasons of adding the "sea" element to the new entry of the series during an interview. Komori said that the image of "Etrian Odyssey" was a green sea of trees and that of "Etrian Odyssey II" was the chill sky of North Europe. When he came to think about the theme for the third title, he felt really attracted by the warm southern sea.