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