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