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