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