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