Here is the full list of all 30 Avadon 2: The Corruption achievements.
Show that there is nowhere the Hands of Avadon cannot reach.
Investigate another Tawon temple.
Fully explore the abandoned workshop outside Troezen.
Conclude your business at Konstina's camp.
Find Eye Dymas and help her return to safety.
Kiss somebody.
Get away from the lair of Vardegras.
Hunt down Chabon and bring him to justice.
Escape a Tawon temple alive.
Augment 20 items.
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 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.)
Have Nicodemus complete six artifacts for you.
Return two honor tokens to Avadon.
Buy two houses. Yes, two!
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!