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.
Complete all underwater location objectives.
Raise your Bounty to the maximum level.
Recover the Cyclops's eye from a goat on Kephallonia.
Complete Xenia's questline.
Defeat all the Cultists of Kosmos.
Upgrade your Spear to Tier 6.
Complete Episode 9 + Epilogue.
Complete Episode 8.
Complete Episode 7.
Complete the Olympic questline.
Unveil all sub-regions of Greece.
Complete the Daughters of Artemis questline.
Defeat the Minotaur.
Defeat a Mercenary in the Arena.
Become Champion of the Arena.
Perform an Overpower Attack with every weapon type.
Complete 20 Quests on Pephka, Obsidian and Abantis islands.
Defeat Medusa.
Outwit the Sphinx.
Discover Atlantis and speak with Pythagoras.
Defeat the Cyclops.
Become the first Mercenary.
Acquire a Tier 3 active Ability.
Engrave a Legendary Item with a Legendary Effect.
Reach Level 50.
Upgrade the Adrestia to Legendary Status.
Complete the Hippokrates questline.
Complete Episode 6.
Complete Markos's questline.
Complete Episode 5.
Defeat a full cluster of Cultists of Kosmos.
Equip a Legendary Armor set.
Equip 1 Legendary melee weapon and 5 Legendary armor pieces.
Complete 20 Bounties, War Contracts, or Naval Quests from Message Boards.
Complete Episode 4.
Sink your first Epic Ship.
Cleave a ship while having an all-women crew.
Fully crew the Adrestia with Legendary Lieutenants.
Upgrade the Adrestia for the first time.
Complete Episode 3.
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.
Recruit and assign a Legendary NPC for your ship.
Cleave a ship in half.
Acquire and equip your first Legendary item.
Complete Episode 2.
Complete Episode 1.
Spend the night with another character.
Engrave your first item.
Complete the Battle of 300.
Heal by getting 10 headshot kills while you have the Golden Harbinger equipped.
Kill 10 enemies using the Fury of the Bloodline Ability.
Heal by parrying 10 times with the Judgment of the Lion.
Kill the Makedonian 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.
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
Kill 10 enemies using the Death Veil ability
Complete Old Flames Burn Brighter
Complete The Heir of Memories
Complete One Really, Really Bad Day
Complete Every Story Has an Ending
Complete A Friend Worth Dying For
Complete A Poet's Legacy.
Complete The Show Must Go On.
Complete The Image of Faith
Complete Divine Intervention.
Complete A Brother's Seduction
Complete The Daughters of Lalaia
Win the conquest of Elysium with freed humans from the 3 main regions.
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.
Collect all the Keeper's Insights in Episode 2.
Close all Tartaros Rifts.
Defeat Cerberos.
Kill all Overseers in Elysium.
Remember who you are.
Collect all the Keeper's Insights in Episode 1.
Destroy all of the Marble Maiden Tributes.
Defeat Arges, the Bright One
Defeat Steropes the Lightning Bringer.