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