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