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