The Legacy of the First Blade Add-on for Assassin's Creed Odyssey has 15 achievements.
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
Continue the bloodline.
Kill all of the Ancients in the Order of the Storm in Achaia.
Kill all the Ancients in the Order of the Hunters in Makedonia
Discover the truth about Darius' past
Kill the Makedonian Lion
Kill 10 enemies using the Fury of the Bloodline Ability.
Kill 10 enemies using the Death Veil ability
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.
Heal by getting 10 headshot kills while you have the Golden Harbinger equipped.