To unlock The Conqueror trophy in Assassin's Creed Odyssey, you must first purchase the first episode of The fate of Atlantis (or own the Season Pass) and download Episode 1.
Please note: This trophy is missable.
To unlock the trophy, you will need to complete the optional quest called Free Their Minds, the Rest Will Follow before you begin the final Conquest Battle. If you progress to through the story quests without completing it, the quest will be removed from your quest log.
Free Their Minds, the Rest Will Follow
- Liberate 8 mind-controlled humans in Minos's Faith
- Liberate 8 mind-controlled humans in Pheraia's Retreat
- Liberate 8 mind-controlled humans in Deukalion's Heritage