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