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