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.
Complete Avadon 2 and take Redbeard's place. (Normal difficulty or higher.)
Reach the endgame without ever using a Resurrection scroll. (Normal difficulty or higher.)
Show that there is nowhere the Hands of Avadon cannot reach.
Investigate another Tawon temple.
Fully explore the abandoned workshop outside Troezen.
Buy two houses. Yes, two!
Kill Vardegras. (Normal difficulty or higher.)
Have Nicodemus complete six artifacts for you.
Find Eye Dymas and help her return to safety.
Conclude your business at Konstina's camp.
Kiss somebody.
Get away from the lair of Vardegras.
Return two honor tokens to Avadon.
Augment 20 items.
Eat a cake.
Hunt down Chabon and bring him to justice.
Escape a Tawon temple alive.
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.
Unlock 30 codex entries.
Kill Krymhylas, Lord of Winds. (Hard difficulty or higher.)
Kill a god on Torment difficulty!