Here is the full list of all 50 The Book of Unwritten Tales 2 achievements worth 1,000 gamerscore.
You've prevailed against evil
You've watched the entire end credits
You've returned unscathed from the castle
You've turned Timmy back to normal
You've invoked the arch mage
You've obtained the Igor outfit
You've beaten the Fear
You've chased off the spider in the Darkwood
You've obtained the ghost detecting device
You've won the battle, but not the war
You've obtained the Red Pirate's compass
You've obtained the Book of the Dead
You've won the Nim game without cheating
You've let Nate wear the "special" outfit
You've obtained the Spark of Life
You've freed your team mates
You've fulfilled the oracle's wishes
You've beaten the Red Pirate at poker
You've found Rémi and learned more about Wilburs staff
You've freed your leader and your noble steed
You've issued all four laws
You've solved the tasks of all four gods
You've illuminated the dark cave
You've rescued Ivo
You've helped the zombies with the slate production
You've strengthened a friendship
You've brought back a friend
You've disguised convincingly
You've restored the electricity
You've escaped despite the surprising twist
You've animated your golem
You've built your own golem
You've mixed the magic ink
You've asked the right math problem at the first go
You've received the key to the city gate
You've stolen the lamp and fled
You've sobered up Nate
You've hit all the symbols in the Drunken Punch minigame
You've mastered your first day of school
You've finished the headmaster's cleaning tasks
You've rid the school of kobolds
You've solved the time travel side-quest
You brought back the library
You've read all student files
You've escaped the Elfburrow
You've been enlightened five times
You know that Ivo is pregnant
You've received the hat of the Master Fisher
You've finished the tutorial
You've survived the fall