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