Here is the full list of all 13 Zombie Derby 2 achievements.
Make 20 flips
Kill 5 birds
Die 20 times
Buy a sticker
Get 3 stars at one level
Kill 100 zombies
Complete tutorial
Complete story levels
Get all stars
Pimp up all cars
Earn 12000 points
3000 m in SURVIVAL mode
Complete 5 random levels