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.
Complete Markos's questline.
Complete the Hippokrates questline.
Complete all underwater location objectives.
Upgrade the Adrestia to Legendary Status.
Complete 20 Quests on Pephka, Obsidian and Abantis islands.
Unveil all sub-regions of Greece.
Fully crew the Adrestia with Legendary Lieutenants.
Upgrade your Spear to Tier 6.
Complete Episode 9 + Epilogue.
Defeat all the Cultists of Kosmos.
Complete Episode 8.
Defeat Medusa.
Complete the Daughters of Artemis questline.
Become Champion of the Arena.
Reach Level 50.
Complete Xenia's questline.
Become the first Mercenary.
Complete Episode 7.
Cleave a ship while having an all-women crew.
Defeat the Minotaur.
Engrave a Legendary Item with a Legendary Effect.
Defeat the Cyclops.
Complete the Olympic questline.
Equip 1 Legendary melee weapon and 5 Legendary armor pieces.
Equip a Legendary Armor set.
Engrave your first item.
Outwit the Sphinx.
Perform an Overpower Attack with every weapon type.
Complete 20 Bounties, War Contracts, or Naval Quests from Message Boards.
Acquire a Tier 3 active Ability.
Defeat a full cluster of Cultists of Kosmos.
Win your first on land conquest battle in any region (excluding Megaris in Hero's Journey).
Discover Atlantis and speak with Pythagoras.
Defeat a Mercenary in the Arena.
Complete Episode 6.
Complete Episode 5.
Raise your Bounty to the maximum level.
Complete Episode 4.
Recruit and assign a Legendary NPC for your ship.
Kill the Leader of any Region with Low Resources, other than Megaris.
Cleave a ship in half.
Complete Episode 3.
Complete Episode 2.
Spend the night with another character.
Acquire and equip your first Legendary item.
Sink your first Epic Ship.
Upgrade the Adrestia for the first time.
Complete Episode 1.
Complete the Battle of 300.
Heal by getting 10 headshot kills while you have the Golden Harbinger equipped.
Acquire the Sword of Kings
Kill all the Ancients in the Order of Dominion in Messenia
Secure your bloodline
Kill 10 enemies using the Fury of the Bloodline Ability.
Kill the Makedonian Lion
Land a Rush Assassinate that chains 4 times with the Blade of the Lion
Kill all of the Ancients in the Order of the Storm in Achaia.
Set 10 enemy ships on fire.
Continue the bloodline.
Heal by parrying 10 times with the Judgment of the Lion.
Kill 10 enemies using the Rapid Fire ability.
Discover the truth about Darius' past
Kill all the Ancients in the Order of the Hunters in Makedonia
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 A Friend Worth Dying For
Complete The Heir of Memories
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.
Kill 10 Isu Soldiers with the Blessing of Kronos enhancement.
Forge the 3 Legendary Weapons.
Collect all the Keeper's Insights in Episode 3.
Completely fill the Knowledge Sequence.
Dethrone the king.
Close all Tartaros Rifts.
Defeat all of the Fallen.
Collect all the Keeper's Insights in Episode 2.
Defeat Cerberos.
Win the conquest of Elysium with freed humans from the 3 main regions.
Destroy all of the Marble Maiden Tributes.
Kill all Overseers in Elysium.
Collect all the Keeper's Insights in Episode 1.
Remember who you are.
Defeat Arges, the Bright One
Defeat Steropes the Lightning Bringer.