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