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