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