Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Dangerous Love	Kiss Sir Brash.
Deception	Finish Chapter 3.
Demon Speech 1	Decipher all the messages in Chapter 1.
Demon Speech 2	Decipher the message in Chapter 2.
Demon Speech 3	Decipher all the messages in Chapter 3.
Demon Speech 4	Decipher the message in Chapter 4.
Demoncat (secret)	Examine Mr. Edgardo after the dinner with Orchid. (Secret)
Demonspawn Lore	Read the book about demonspawn in Chapter 1.
Descension	Finish Chapter 1.
Destroyer	Max out both Evil and Defiant points.
Infernal Patron	Ask the demonspawn as many questions as you can.
Inferno	Finish Chapter 4.
Murderer	Kill Mark.
Rebel	Max out both Good and Defiant points.
Resourceful (secret)	(Secret)
Retribution (secret)	(Secret)
Reverie	Finish Chapter 2.
Saint	Max out both Good and Tactful points.
Science Macabre	Read all the entries of Rivera's journal.
Snake	Max out both Evil and Tactful points.
Soft Hearted (secret)	(Secret)
Touchy Fingers (secret)	Molest the demonspawn. (Secret)