Kill 10,000 humans

Let 1,000 zombies die

Collect 1,000 DNA units

Collect 100 Mutation Barrels

Use 5 contaminations on humans

Blast through 256 breakable blocks

Paint over 9,000 blocks with blood

Defeat the Boss in Chapter 1

Defeat the Boss in Chapter 2

Defeat the Boss in Chapter 3

Defeat the Boss in Chapter 4

Destroy 28 doors

Kill 50 cops

Kill Gronald

Bite 1,337 humans to death

Let 66 zombies fall to their death

Lose a level by sacrificing your last zombie

Blow up 4 humans with a single explosion

Scare 6 humans with a single scream

Assemble a horde of 12 zombies with a screaming Overlord

Prevent a zombie from falling to its death by blowing up another zombie

Fall with style for at least 10 seconds with a zombie

Kill a zombie by blowing up another zombie nearby

Kill a zombie by making him jump from too high

Kill 7 enemies with a single Tank dash

Let a Tank get squashed

Bite 10 humans to death in 15 seconds

Successfully complete all levels

Successfully complete all challenges

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