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.
Engrave a Legendary Item with a Legendary Effect.
Complete all underwater location objectives.
Defeat Medusa.
Outwit the Sphinx.
Complete the Hippokrates questline.
Equip a Legendary Armor set.
Defeat all the Cultists of Kosmos.
Upgrade your Spear to Tier 6.
Defeat the Cyclops.
Become the first Mercenary.
Complete 20 Quests on Pephka, Obsidian and Abantis islands.
Defeat the Minotaur.
Raise your Bounty to the maximum level.
Complete the Daughters of Artemis questline.
Unveil all sub-regions of Greece.
Defeat a Mercenary in the Arena.
Become Champion of the Arena.
Complete Episode 9 + Epilogue.
Complete Episode 8.
Complete Episode 7.
Complete the Olympic questline.
Upgrade the Adrestia to Legendary Status.
Discover Atlantis and speak with Pythagoras.
Equip 1 Legendary melee weapon and 5 Legendary armor pieces.
Complete Markos's questline.
Complete Xenia's questline.
Acquire a Tier 3 active Ability.
Reach Level 50.
Defeat a full cluster of Cultists of Kosmos.
Complete Episode 6.
Complete Episode 5.
Fully crew the Adrestia with Legendary Lieutenants.
Complete Episode 4.
Complete 20 Bounties, War Contracts, or Naval Quests from Message Boards.
Sink your first Epic Ship.
Cleave a ship while having an all-women crew.
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.
Complete Episode 3.
Engrave your first item.
Complete Episode 2.
Spend the night with another character.
Acquire and equip your first Legendary item.
Recruit and assign a Legendary NPC for your ship.
Upgrade the Adrestia for the first time.
Cleave a ship in half.
Complete Episode 1.
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.
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
Set 10 enemy ships on fire.
Continue the bloodline.
Kill all of the Ancients in the Order of the Storm in Achaia.
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 The Image of Faith
Complete The Show Must Go On.
Complete One Really, Really Bad Day
Complete A Poet's Legacy.
Complete Divine Intervention.
Complete A Brother's Seduction
Complete A Friend Worth Dying For
Complete The Daughters of Lalaia
Complete The Heir of Memories
Complete Every Story Has an Ending
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.
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.
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.