Complete the level
Kill 1000 zombies
Kill 800 zombies
Kill 200 zombies
Kill 600 zombies
Kill 400 zombies
Make 3 flips
Get 3 stars at one level
Earn 1000 points
Buy a sticker
Fully upgrade your car
Die 2 times
Kill 2 birds
Buy a gun
Unlock your first car
Complete tutorial