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