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