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