Here is the full list of all 14 Survival: Zombies aHead achievements.
Cut a sequence of 50 brains without missing one
Do not cut any brain in a sequence of 50
Score 1000 points in a single match
Cut 3+ of the same type of zombie quickly
Get bitten by a zombie
Save a Person
Lose a match by killing people
Kill a person
Kill a zombie
Lose a match becoming a zombie
Kill 250 zombies in a single match
Save 50 people in a single match
Score 5000 points in a single match
Make a 30+ hit combo sequence