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