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