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