Here is the full list of all 21 Zombie Gotchi achievements.
It will survive you!
Coming Home!
Happy Happy Happy!
Looks like your Brain next!
Best Hair Ever!
Still no sign of life!
They looking friendly!
Yummy, Bunny!
There is something in there!
Did you hit?
Yay, Zombies get ill?
Do you remember?
Delicious!
Let's battle!
I can see living People!
You survived the Tutorial!
You have gotten a Boy!
You have gotten a Girl!
Didn't liked your Zombie?
Did i meant "Alive"?
Snack Bubble!