Assassinscreedroguecodex Exclusive Here

The tag generally applies to the additional missions and customization items that were not included in the standard base game at launch.

You cannot get the high-altitude Codex pages without sending scouts to the "Undiscovered Viewpoints" in the North Atlantic. The exclusive trick is that Codex pages only spawn when the region is at 60% synchronization. assassinscreedroguecodex exclusive

“Relive Shay Cormac’s memories through the Templar Order’s own redacted Codex entries — with exclusive missions, lore, developer commentary, and gameplay twists.” The tag generally applies to the additional missions