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.
Complete all underwater location objectives.
Upgrade your Spear to Tier 6.
Defeat all the Cultists of Kosmos.
Complete Episode 9 + Epilogue.
Complete the Hippokrates questline.
Complete Episode 8.
Complete Episode 7.
Defeat Medusa.
Complete the Daughters of Artemis questline.
Upgrade the Adrestia to Legendary Status.
Defeat the Minotaur.
Complete 20 Quests on Pephka, Obsidian and Abantis islands.
Complete Markos's questline.
Unveil all sub-regions of Greece.
Become the first Mercenary.
Become Champion of the Arena.
Defeat a Mercenary in the Arena.
Reach Level 50.
Outwit the Sphinx.
Complete the Olympic questline.
Discover Atlantis and speak with Pythagoras.
Defeat the Cyclops.
Acquire a Tier 3 active Ability.
Complete Xenia's questline.
Perform an Overpower Attack with every weapon type.
Sink your first Epic Ship.
Engrave your first item.
Engrave a Legendary Item with a Legendary Effect.
Defeat a full cluster of Cultists of Kosmos.
Cleave a ship while having an all-women crew.
Fully crew the Adrestia with Legendary Lieutenants.
Complete Episode 6.
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.
Recover the Cyclops's eye from a goat on Kephallonia.
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.
Upgrade the Adrestia for the first time.
Cleave a ship in half.
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.
Land a Rush Assassinate that chains 4 times with the Blade of the Lion
Kill the Makedonian Lion
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
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.
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 Rapid Fire ability.
Kill 10 enemies using the Death Veil ability
Complete The Heir of Memories
Complete Every Story Has an Ending
Complete One Really, Really Bad Day
Complete The Daughters of Lalaia
Complete The Show Must Go On.
Complete The Image of Faith
Complete Old Flames Burn Brighter
Complete Divine Intervention.
Complete A Brother's Seduction
Complete A Friend Worth Dying For
Complete A Poet's Legacy.
Defeat the Hekatonchires.
Forge the 3 Legendary Weapons.
Completely fill the Knowledge Sequence.
Collect all the Keeper's Insights in Episode 3.
Kill 10 Isu Soldiers with the Blessing of Kronos enhancement.
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.
Destroy all of the Marble Maiden Tributes.
Remember who you are.
Collect all the Keeper's Insights in Episode 1.
Kill all Overseers in Elysium.
Defeat Steropes the Lightning Bringer.
Defeat Arges, the Bright One