Full list of all 93 Assassin's Creed Odyssey achievements. It takes around 80-100 hours to unlock all of the achievements in the base game on Windows.
The base game contains 50 achievements, and there are 5 DLC packs containing 43 achievements.
Upgrade the Adrestia to Legendary Status.
Complete 20 Bounties, War Contracts, or Naval Quests from Message Boards.
Complete the Hippokrates questline.
Complete Markos's questline.
Recover the Cyclops's eye from a goat on Kephallonia.
Complete all underwater location objectives.
Complete Xenia's questline.
Defeat Medusa.
Complete the Daughters of Artemis questline.
Complete 20 Quests on Pephka, Obsidian and Abantis islands.
Become Champion of the Arena.
Perform an Overpower Attack with every weapon type.
Fully crew the Adrestia with Legendary Lieutenants.
Recruit and assign a Legendary NPC for your ship.
Unveil all sub-regions of Greece.
Defeat the Cyclops.
Engrave a Legendary Item with a Legendary Effect.
Reach Level 50.
Defeat all the Cultists of Kosmos.
Upgrade your Spear to Tier 6.
Become the first Mercenary.
Complete Episode 9 + Epilogue.
Complete Episode 8.
Defeat the Minotaur.
Win your first on land conquest battle in any region (excluding Megaris in Hero's Journey).
Complete Episode 7.
Raise your Bounty to the maximum level.
Complete the Olympic questline.
Acquire a Tier 3 active Ability.
Outwit the Sphinx.
Equip 1 Legendary melee weapon and 5 Legendary armor pieces.
Equip a Legendary Armor set.
Discover Atlantis and speak with Pythagoras.
Kill the Leader of any Region with Low Resources, other than Megaris.
Defeat a Mercenary in the Arena.
Complete Episode 6.
Complete Episode 5.
Defeat a full cluster of Cultists of Kosmos.
Engrave your first item.
Complete Episode 4.
Cleave a ship while having an all-women crew.
Sink your first Epic Ship.
Complete Episode 3.
Complete Episode 2.
Spend the night with another character.
Acquire and equip your first Legendary item.
Upgrade the Adrestia for the first time.
Cleave a ship in half.
Complete Episode 1.
Complete the Battle of 300.
Heal by getting 10 headshot kills while you have the Golden Harbinger equipped.
Acquire the Sword of Kings
Secure your bloodline
Kill all the Ancients in the Order of Dominion in Messenia
Kill 10 enemies using the Fury of the Bloodline Ability.
Continue the bloodline.
Set 10 enemy ships on fire.
Heal by parrying 10 times with the Judgment of the Lion.
Kill all of the Ancients in the Order of the Storm in Achaia.
Kill 10 enemies using the Rapid Fire ability.
Discover the truth about Darius' past
Land a Rush Assassinate that chains 4 times with the Blade of the Lion
Kill all the Ancients in the Order of the Hunters in Makedonia
Kill the Makedonian Lion
Kill 10 enemies using the Death Veil ability
Complete Old Flames Burn Brighter
Complete Every Story Has an Ending
Complete One Really, Really Bad Day
Complete The Heir of Memories
Complete The Image of Faith
Complete The Show Must Go On.
Complete The Daughters of Lalaia
Complete A Poet's Legacy.
Complete Divine Intervention.
Complete A Brother's Seduction
Complete A Friend Worth Dying For
Defeat the Hekatonchires.
Completely fill the Knowledge Sequence.
Forge the 3 Legendary Weapons.
Kill 10 Isu Soldiers with the Blessing of Kronos enhancement.
Collect all the Keeper's Insights in Episode 3.
Dethrone the king.
Defeat all of the Fallen.
Close all Tartaros Rifts.
Collect all the Keeper's Insights in Episode 2.
Defeat Cerberos.
Win the conquest of Elysium with freed humans from the 3 main regions.
Remember who you are.
Collect all the Keeper's Insights in Episode 1.
Destroy all of the Marble Maiden Tributes.
Kill all Overseers in Elysium.
Defeat Arges, the Bright One
Defeat Steropes the Lightning Bringer.