Here is the full list of all 29 Pendragon Rising achievements.
Become Pendragon of Britain.
Kill the heir to the Saxon throne.
Gain the support of the kingdom of Dyfed.
Gain the support of the kingdom of Kernow.
Gain the support of the kingdom of Dumnonia.
Gain a legendary weapon.
Gain the support of a religious fanatic.
Save as many villagers as possible from the Saxon wolves.
Summon the dragon to aid Gwynedd.
Survive your first battle.
Make peace with the Saxons.
Give heart to the Britons with inspirational speeches.
Decisively win every battle.
A new start for Britain.
Perform an act of true selflessness.
Gain the support of the kingdom of Powys
Gain the support of the kingdom of Lothian.
Gain the support of the kingdom of Strathclyde.
Gain as much support as possible.
Gain a royal guesting cup.
Gain a symbol of rulership.
Gain the banner of your people.
Earn a royal reward.
Always willing to stand alone in combat.
Make a choice between two affairs of the heart.
Save the life of a child beset by dreams of wolves.
Use the hidden causeway to the Isle of the Dead.
Refuse to surrender to the Saxons.
Voluntarily relinquish your claim to the throne.