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