Here is the full list of all 32 Curse of the Assassin achievements.
Find all the artwork in Curse of the Assassin
Visit all the taverns in the story
Defeat the leader of the Hombre Peces
Find the best armour in the gamebook
Complete the gamebook in Casual Mode
Hear the 'Endecha de la Sangre'
Save a companion from some watery rapids
Recruit all members of the Death Hawks
Successfully use your hunting skills
Successfully report back to the Head Gaoler
Find the best weapon in the gamebook
Fool the mighty Coca Rabixa
Complete the gamebook in Adventurer Mode
Return a ring to the rightful owners
Laugh hysterically with Esplandian
Complete the gamebook in Classic Mode
Purify the water in a well
Meet all the creatures from folklore and legend
Steal a sheep
Return a cry three times when out at sea
Find out the meaning behind the 'breadbasket of Orlandes'
Offer your life for another
Become possessed by an ultimate boss
Meet a Sanziana and receive a special gift
Rescue two people very close to you
Find out the location of the Jewel of Orlandes
Roll 3 ones in one dice roll
Discover a dastardly plot
Roll 3 sixes in one roll
Receive a threatening letter
Receive a special blessing
Learn the secrets of Coyote Lore