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