Here is the full list of all 30 Keyhole Spy: Frozen Hotties achievements.
Complete 15 puzzle with Marta
Win playing as Marta
Unfreeze Marta
Complete 15 puzzle with Erika
Win playing as Erika
Complete 15 puzzle with Ingrid
Win playing as Ingrid
Complete 15 puzzle with Carolina
Win playing as Carolina
Complete 15 puzzle with Viveka
Win playing as Viveka
Complete 15 puzzle with Astrid
Win playing as Astrid
Complete 15 puzzle with Gerda
Win playing as Gerda
Complete 15 puzzle with Elsa
Win playing as Elsa
Complete 15 puzzle with Christina
Complete 15 puzzle with Hanna
Win, playing for Christina
Win, playing for Hanna
Unfreeze Erika
Unfreeze Ingrid
Unfreeze Carolina
Unfreeze Viveka
Unfreeze Astrid
Unfreeze Gerda
Unfreeze Elsa
Unfreeze Christina
Unfreeze Hanna!