Here is the full list of all 9 Doodle Devil achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Opened all reactions with fire.
Opened all reactions with sin.
Episode One passed.
Episode Two passed.
Created 5 elements in a row.
Created 10 elements.
Created 50 elements.
Opened 7 deadly sins.
Opened all good elements.