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