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