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