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