Here is the full list of all 30 Avadon 3: The Warborn achievements.
Take the throne. (Normal difficulty or higher.)
Infiltrate. Learn. Escape.
Complete Avadon on any difficulty.
Recover the great traitor's invitation.
Bring peace to the Beraza Woods with minimal bloodshed.
Read 30 codexes.
Establish your dominance over the Warborn.
Augment 20 items.
Deal with the brutal stalemate in The Kva.
Recover from Avadon everything that you need.
Free the Eternal Prisoner.
Put on your own magical disguise.
Win a Hand's loyalty.
Find the irritant that is expanding The Corruption. Remove it.
Find a route to peace with the Wyldrylm rebels.
Drive Dheless out of Khemeria.
Report Geert's fate, good or bad.
Complete the tutorial.
Open a secret door.
Steal the invitation from the servant of a living god.
Complete Avadon on Hard difficulty or higher.
Complete Avadon on Torment difficulty.
Restore Redbeard to his rightful place. (Normal difficulty or higher.)
Have Nicodemus craft six items for you.
Complete the entire game without ever using a Resurrection scroll. (Normal difficulty or higher.)
Cement your alliance with the ogres.
On the Corruption border, fight all six Farlanders at once.
Bring Avadon knowledge of three libraries.
Kill a dragon. (Hard difficulty or higher.)
Kill a god. Not an old, feeble god. One of the tough ones. (Torment difficulty.)