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