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.
Complete 20 Quests on Pephka, Obsidian and Abantis islands.
Defeat all the Cultists of Kosmos.
Upgrade the Adrestia to Legendary Status.
Upgrade your Spear to Tier 6.
Defeat the Cyclops.
Outwit the Sphinx.
Defeat the Minotaur.
Complete Markos's questline.
Defeat Medusa.
Complete the Hippokrates questline.
Complete the Daughters of Artemis questline.
Complete Xenia's questline.
Reach Level 50.
Unveil all sub-regions of Greece.
Defeat a Mercenary in the Arena.
Become Champion of the Arena.
Complete all underwater location objectives.
Perform an Overpower Attack with every weapon type.
Become the first Mercenary.
Fully crew the Adrestia with Legendary Lieutenants.
Complete Episode 9 + Epilogue.
Complete Episode 8.
Complete Episode 7.
Acquire a Tier 3 active Ability.
Complete 20 Bounties, War Contracts, or Naval Quests from Message Boards.
Defeat a full cluster of Cultists of Kosmos.
Equip a Legendary Armor set.
Equip 1 Legendary melee weapon and 5 Legendary armor pieces.
Complete the Olympic questline.
Discover Atlantis and speak with Pythagoras.
Complete Episode 6.
Complete Episode 5.
Sink your first Epic Ship.
Complete Episode 4.
Engrave a Legendary Item with a Legendary Effect.
Cleave a ship while having an all-women crew.
Complete Episode 3.
Kill the Leader of any Region with Low Resources, other than Megaris.
Spend the night with another character.
Win your first on land conquest battle in any region (excluding Megaris in Hero's Journey).
Raise your Bounty to the maximum level.
Complete Episode 2.
Acquire and equip your first Legendary item.
Recruit and assign a Legendary NPC for your ship.
Upgrade the Adrestia for the first time.
Cleave a ship in half.
Complete Episode 1.
Engrave your first item.
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.
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 10 enemies using the Rapid Fire ability.
Set 10 enemy ships on fire.
Heal by parrying 10 times with the Judgment of the Lion.
Kill 10 enemies using the Death Veil ability
Kill the Makedonian Lion
Discover the truth about Darius' past
Kill all the Ancients in the Order of the Hunters in Makedonia
Land a Rush Assassinate that chains 4 times with the Blade of the Lion
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 A Brother's Seduction
Complete A Poet's Legacy.
Complete The Daughters of Lalaia
Complete The Image of Faith
Complete Divine Intervention.
Complete The Show Must Go On.
Defeat the Hekatonchires.
Forge the 3 Legendary Weapons.
Kill 10 Isu Soldiers with the Blessing of Kronos enhancement.
Completely fill the Knowledge Sequence.
Collect all the Keeper's Insights in Episode 3.
Dethrone the king.
Defeat all of the Fallen.
Collect all the Keeper's Insights in Episode 2.
Close all Tartaros Rifts.
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.
Collect all the Keeper's Insights in Episode 1.
Kill all Overseers in Elysium.
Defeat Arges, the Bright One
Defeat Steropes the Lightning Bringer.