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