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