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