Here is the full list of all 34 Zombie Night Terror achievements.
Kill 10,000 humans
Successfully complete all challenges
Bite 1,337 humans to death
Paint over 9,000 blocks with blood
Create a level and upload it to Steam Workshop
Start the level editor
Spend 104 minutes on the Credits page
Successfully complete all levels
Defeat the Boss in Chapter 4
Be patient!
Lose a level by sacrificing your last zombie
¯\_(ツ)_/¯
Assemble a horde of 12 zombies with a screaming Overlord
Defeat the Boss in Chapter 3
Let a Tank get squashed
Kill 7 enemies with a single Tank dash
Collect 100 Mutation Barrels
Defeat the Boss in Chapter 2
Let 1,000 zombies die
Let 66 zombies fall to their death
Blast through 256 breakable blocks
Kill 50 cops
Blow up 4 humans with a single explosion
Scare 6 humans with a single scream
Collect 1,000 DNA units
Kill Gronald
Fall with style for at least 10 seconds with a zombie
Defeat the Boss in Chapter 1
Kill a zombie by making him jump from too high
Prevent a zombie from falling to its death by blowing up another zombie
Kill a zombie by blowing up another zombie nearby
Destroy 28 doors
Use 5 contaminations on humans
Bite 10 humans to death in 15 seconds