Here is the full list of all 17 Frozen Free Fall: Snowball Fight achievements worth 1,000 gamerscore.
Complete 50 Snowball Fights
Obtain a total of 500 stars
Beat your opponent with 10 different characters
Combine 10 Iceberg and Glacier gems
Dodge 3 snowballs in a round
Finish first 100 Winter levels
Combine 20 Windchill and Glacier gems
Combine 5 Double Glacier gems
Combine 30 Windchill gems
Combine 15 Double Iceberg gems
Throw 3 super snowballs in a round
Throw 10 snowballs in a round
Combine 25 Windchill and Iceberg gems
Obtain a total of 100 stars
Obtain a total of 1 Million points
Obtain 150,000 Points on one level
Obtain 50,000 Points on one level