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