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