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