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