Assassin's Creed Odyssey

The Fallen in this DLC take the place of the Mercenaries from the main game and they can be found in the menu under the 'The Fallen' tab, that itself takes the place of the 'Mercenaries' tab. Most of these are characters that have been defeated initially during the main game's story and are now wandering the underworld, bent on wreaking havoc, though the 4 champions you need to defeat and recruit are legendary figures of Ancient Greece.

There are 11 in total and the majority of them will be necessary enemies during the story for you to defeat and in some cases recruit, however some will require you to complete 'Charon's' side missions up to a point so that you can defeat them all.

4 of them are required to be defeated to find 4 pieces of the 'Fallen' armor.

• Swordfish of Octopus Bay
• Epiktetos the Forthcoming
• Delaneira the Boeotian Champion
• The Poisoner of Athens

You will be given information on them when you acquire the main story mission to find and defeat them for their piece of the armor. Killing 1 of them will yield information on where the next can be found.

Then there are 4 champions who you need to defeat so that they can be placed as guardians of the underworld.

• Perseus the Gorgon Slayer
• Achilles the Trojan War Hero
• King Agamemnon of Mycenae
• Herakles the Legendary

Their locations are also given to you by either the quests to defeat them or the clues your obtain from their defeat.

Then finally another 3 that need to be defeated during either the main story or through Charon's side quests.

• The Monger of Korinthia
• Testikles the Olympian
• The Cyclops of Kephallonia

Once you have found and defeated all of the Fallen, the achievement will unlock.