Here is the full list of all 30 Avadon 2: The Corruption achievements.
Complete Avadon 2 and remain loyal to Redbeard. (Normal difficulty or higher.)
Complete Avadon 2 on Normal difficulty.
Augment 20 items.
Show that there is nowhere the Hands of Avadon cannot reach.
Investigate another Tawon temple.
Fully explore the abandoned workshop outside Troezen.
Find Eye Dymas and help her return to safety.
Hunt down Chabon and bring him to justice.
Conclude your business at Konstina's camp.
Return two honor tokens to Avadon.
Get away from the lair of Vardegras.
Escape a Tawon temple alive.
Buy two houses. Yes, two!
Defeat the ogres and learn the rebels' secret.
Find out where Miranda went.
Explore an abandoned base.
Become a Hand of Avadon.
Find a secret door.
Survive an unexpected attack.
Complete Avadon 2 on Hard difficulty.
Complete Avadon 2 on Torment difficulty.
Complete Avadon 2 and take Redbeard's place. (Normal difficulty or higher.)
Have Nicodemus complete six artifacts for you.
Kiss somebody.
Reach the endgame without ever using a Resurrection scroll. (Normal difficulty or higher.)
Eat a cake.
Unlock 30 codex entries.
Kill Vardegras. (Normal difficulty or higher.)
Kill Krymhylas, Lord of Winds. (Hard difficulty or higher.)
Kill a god on Torment difficulty!