You can play the entire game in modern 3D or classic 16-bit top-down style.

The Echoes of an Elusive Age edition of Dragon Quest XI introduces new features and changes to the Codex:

It sounds like you're looking for a on Dragon Quest XI: Echoes of an Elusive Age — potentially focusing on the "Codex" or a new aspect of the game (e.g., the Definitive Edition or a newly discovered mechanic/lore element).

Guided by the thief Erik , you assemble a band of loyal companions to reach the World Tree, Yggdrasil , the source of all life. Your goal is to gather six sacred orbs to unlock the path to the tree and stop the Lord of Shadows .