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