Level Up on Google Play Games 'Family Games Master'

I play Baby Adopter, Baby Adopter Sea, Baby Adopter Holidays, and Milky Baby on Google Play.
On Baby Adopter i unlocked 10 achievements. Their are 12 achievements total in the game.
On Baby Adopter Sea I unlocked all 6 achievements total in the game.
On Baby Adopter Holidays I unlocked all 8 achievements total in the game.
On Milky Baby I unlocked 4 achievements. Their are 6 achievements total in the game.
In Google Play Games I am a "Family Games Master" whatever that means.