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