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