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