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