Here is the full list of all 13 Shadows: Heretic Kingdoms achievements.
Complete Book One.
Reach level 10.
Successfully escape Thole.
Unlock the Ishkai Sniper soul.
Max out one of your skills with any puppet.
Defeat the Aphotic Spider Queen and her minions.
Earn second level
Avoid fighting the Werewolf Berserkers.
Defeat the Scorpion King.
Acquire the Reaper sword.
Reach level 20.
Reach level 30.
Have Zaar fulfill his most fervent desire.