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