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