Here is the full list of all 10 Crystal Picnic achievements.
Find Frogbert's house.
Open every chest in the game.
Watch the list of people guilty of making this game.
Escape the bees in the bonus game.
Fill all crystal slots.
Use a crystal.
Win a prize at Whack-a-Skunk.
Max out attack on one character.
Top out defense on one character.
Find Egbert's House.