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 Episode 9 + Epilogue.
Defeat all the Cultists of Kosmos.
Upgrade your Spear to Tier 6.
Complete Episode 8.
Complete Episode 7.
Unveil all sub-regions of Greece.
Complete all underwater location objectives.
Complete the Olympic questline.
Complete the Daughters of Artemis questline.
Defeat Medusa.
Defeat the Minotaur.
Complete Xenia's questline.
Complete the Hippokrates questline.
Complete 20 Quests on Pephka, Obsidian and Abantis islands.
Defeat the Cyclops.
Outwit the Sphinx.
Discover Atlantis and speak with Pythagoras.
Upgrade the Adrestia to Legendary Status.
Complete Episode 6.
Complete Episode 5.
Acquire a Tier 3 active Ability.
Become Champion of the Arena.
Reach Level 50.
Equip a Legendary Armor set.
Defeat a full cluster of Cultists of Kosmos.
Become the first Mercenary.
Equip 1 Legendary melee weapon and 5 Legendary armor pieces.
Engrave a Legendary Item with a Legendary Effect.
Complete Markos's questline.
Complete Episode 4.
Raise your Bounty to the maximum level.
Defeat a Mercenary in the Arena.
Kill the Leader of any Region with Low Resources, other than Megaris.
Fully crew the Adrestia with Legendary Lieutenants.
Complete 20 Bounties, War Contracts, or Naval Quests from Message Boards.
Perform an Overpower Attack with every weapon type.
Complete Episode 3.
Recover the Cyclops's eye from a goat on Kephallonia.
Sink your first Epic Ship.
Spend the night with another character.
Win your first on land conquest battle in any region (excluding Megaris in Hero's Journey).
Complete Episode 2.
Acquire and equip your first Legendary item.
Upgrade the Adrestia for the first time.
Cleave a ship while having an all-women crew.
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
Heal by getting 10 headshot kills while you have the Golden Harbinger equipped.
Secure your bloodline
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.
Set 10 enemy ships on fire.
Kill all the Ancients in the Order of the Hunters in Makedonia
Discover the truth about Darius' past
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.
Kill 10 enemies using the Fury of the Bloodline Ability.
Kill 10 enemies using the Death Veil ability
Complete Old Flames Burn Brighter
Complete The Heir of Memories
Complete Every Story Has an Ending
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
Complete One Really, Really Bad Day
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.
Collect all the Keeper's Insights in Episode 1.
Destroy all of the Marble Maiden Tributes.
Kill all Overseers in Elysium.
Defeat Arges, the Bright One
Defeat Steropes the Lightning Bringer.