Here is the full list of all 15 Tricks and Treats achievements.
Complete all levels in the Fourth Episode
Complete all levels in the Fourth Episode with 3 stars
Complete all levels with 3 stars
Buy all upgrades
Complete all levels in the Third Episode with 3 stars
Complete all levels in the Third Episode
Complete all levels in the Second Episode with 3 stars
Complete all levels in the Second Episode
Complete all levels in the First Episode with 3 stars
Complete all levels in the First Episode
Make a 7-pieces match 10 times
Complete the first tutorial level
Make a 4-pieces match 10 times
Make a 5-pieces match 10 times
Make a 6-pieces match 10 times