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