Here is the full list of all 15 The Grinch: Christmas Adventures achievements.
Use Max to help Grinch.
Jump over a creature.
Complete a puzzle.
Perform a double jump.
Use the Candy Cane Lasso.
Complete the Grinch's Cave.
Collect 100% of the presents in one level.
Get the Santa Costume.
Hide in different places, such as Wardrobes, Tables or Beds.
Complete the Countryside.
Use the Jetpack.
Freeze something.
Grow the Grinch's heart.
Complete Who-ville.
Complete all the puzzles.