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