The The Fate of Atlantis: Episode 3 Add-on for Assassin's Creed Odyssey has 5 trophies - 4 bronze and 1 silver.
Kill 10 Isu Soldiers with the Blessing of Kronos enhancement.
Completely fill the Knowledge Sequence.
Forge the 3 Legendary Weapons.
Collect all the Keeper's Insights in Episode 3.
Defeat the Hekatonchires.