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