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