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