Kill 10,000 humans
Collect 1,000 DNA units
Let 1,000 zombies die
Collect 100 Mutation Barrels
Use 5 contaminations on humans
Paint over 9,000 blocks with blood
Blast through 256 breakable blocks
Defeat the Boss in Chapter 1
Defeat the Boss in Chapter 2
Defeat the Boss in Chapter 4
Defeat the Boss in Chapter 3
Destroy 28 doors
Kill 50 cops
Bite 1,337 humans to death
Kill Gronald
Let 66 zombies fall to their death
Lose a level by sacrificing your last zombie
Scare 6 humans with a single scream
Blow up 4 humans with a single explosion
Assemble a horde of 12 zombies with a screaming Overlord
Prevent a zombie from falling to its death by blowing up another zombie
Kill a zombie by blowing up another zombie nearby
Fall with style for at least 10 seconds with a zombie
Kill a zombie by making him jump from too high
Kill 7 enemies with a single Tank dash
Bite 10 humans to death in 15 seconds
Let a Tank get squashed
Be patient!
Successfully complete all levels
¯\_(ツ)_/¯
Successfully complete all challenges