Here is the full list of all 29 Hard Rock Zombie Truck achievements.
Kill 6000 zombies
Collect all awards
Kill 30 cats
Kill 3000 zombies in the air
Rescue 30 cats
Blow up 700 zombies
Crush 700 zombies
Blow up 400 zombies
Kill 1500 zombies in the air
Kill 3000 zombies
Kill 20 people
Crush 400 zombies
Blow up 200 zombies
Rescue 15 cats
Crush 200 zombies
Kill evil brain
Kill Evil Evil monster
Kill Bad Santa
Kill 10 cats
Kill 500 zombies in the air
Rescue 10 people
Kill 1000 zombies
Kill 10 people
Rescue 3 cats
Rescue 6 people
Kill 5 cats
Kill BOB
Rescue 3 people
Kill 3 people