Full list of all 67 Assassin's Creed Origins achievements. It takes around 60-80 hours to unlock all of the achievements in the base game on Windows.
The base game contains 53 achievements, and there are 2 DLC packs containing 14 achievements.
Complete the Prologue.
Complete Main Quest "Aya".
Complete Main Quest "Pompeius Magnus".
Complete Main Quest "The Scarab's Lies".
Complete Main Quest "The Hyena".
Complete Main Quest "The Crocodile's Jaws".
Complete Main Quest "The Lizard's Face".
Complete Main Quest "The Aftermath".
Complete Main Quest Dream Sequence.
Complete Main Quest "The Final Weighing".
Complete the last Main Quest.
Be equipped with only Legendary equipment.
Activate a Master ability.
Witness raining bugs in the desert.
Complete all arena events in the Krokodilopolis Arena.
Finish an arena boss with an Overpower Attack.
Win the first Hippodrome tournament.
Destroy an opponent in a Hippodrome race.
Defeat the war elephants Qetesh & Resheph.
Kill 3 enemies with one hit.
Kill an enemy with the predator bow from more than 60 meters while controlling the arrow.
Complete all hermit locations.
Feed a predator with a corpse.
Complete Side Quest "Seven Farmers".
Complete Side Quest "Lady of Slaughter".
Kill 10 enemies in a row without being detected.
Destroy 100 breakable objects.
Defog the whole map.
Complete a tomb.
Reach the "Top of the World" in the Black Desert territory.
Bring a tamed lion to a crocodile.
Defeat 8 Ship Captains.
Take 1 photo in 5 different territories.
Kill a poisoned level 35+ enemy with the torch in less than 30 seconds.
Use the eagle for a total of 30 minutes.
Swim for 1500m, ride for 40km and run for 10km.
Headshot kill an enemy with the bow while in the air.
Kill 30 enemies by shooting a fire arrow at oil jars.
Use all types of vehicle at least once.
Complete all locations.
Run away from 3 fights with a hippo.
Solve a papyrus mystery.
Sell 100 trinkets at once.
Use Dawn & Dusk to make time speed forward 30 times.
Reach level 20.
Complete all 12 Stone Circles.
Complete 15 underwater locations.
Defeat a Phylakes.
Craft 20 items.
Tame a lion.
Complete one tour
Complete all tours in the Daily Life category
Complete tours with at least 5 different characters
Perform a leap of faith from Arsinoe's sundial obelisk between 10 am and noon (The Hidden Ones)
Perform 3 Assassinations from a zipline (The Hidden Ones)
Free 20 Rebels (The Hidden Ones)
Kill an enemy with a headshot while they are being harassed by Senu (The Hidden Ones)
Complete the Walls-of-the-Ruler citadel (The Hidden Ones)
Assasinate Tacito, Ptahmose and Ampelius (The Hidden Ones)
Complete Side DLC Quests "Rise of Shaqilat" and "Shadows of the Scarab" (The Hidden Ones)
Complete Main DLC Quest "The Greater Good" (The Hidden Ones)
Reach level 55 (The Curse of the Pharaohs)
Acquire Eternal Maw for use outside the Afterlifes (The Curse of the Pharaohs)
Complete the 5 Serqet locations (The Curse of the Pharaohs)
Craft an upgrade using Shards of a Star (The Curse of the Pharaohs)
Kill a Mummy by setting it on fire (The Curse of the Pharaohs)