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.)
Eat a cake.
Show that there is nowhere the Hands of Avadon cannot reach.
Kill Vardegras. (Normal difficulty or higher.)
Return two honor tokens to Avadon.
Investigate another Tawon temple.
Fully explore the abandoned workshop outside Troezen.
Find Eye Dymas and help her return to safety.
Conclude your business at Konstina's camp.
Get away from the lair of Vardegras.
Augment 20 items.
Hunt down Chabon and bring him to justice.
Escape a Tawon temple alive.
Buy two houses. Yes, two!
Defeat the ogres and learn the rebels' secret.
Find a secret door.
Find out where Miranda went.
Explore an abandoned base.
Survive an unexpected attack.
Become a Hand of Avadon.
Complete Avadon 2 on Hard difficulty.
Complete Avadon 2 on Torment difficulty.
Have Nicodemus complete six artifacts for you.
Kiss somebody.
Unlock 30 codex entries.
Kill Krymhylas, Lord of Winds. (Hard difficulty or higher.)
Kill a god on Torment difficulty!