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