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