First Timer

Late Title Card

Vaccination into Mutation

Buspocalypse

Movie Lover

Endangered Species

Winnar!

These should all unlock as you play through the Campaign without you needing to worry about them.

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Paleozombology

This requires you to play through the last level (Act 3, Level 5) and beat the boss without activating the forklift. You can use any weapon pickups you want on the boss, and of course the basic surround-to-kill mechanic of the game. It is not that difficult, but may require a few tries. And you shouldn't need to activate the forklift at all to finish the game.

Con-GRAVE-ulations
Complete all 10 blocks in Graveyard Survival.

Occupy Town Hall
Complete all 20 blocks in Town Hall Survival.

Both of these are not all that difficult, but it can be frustrating to get an unfortunate set up in one of the last few blocks and have to start all over again. Luckily there is a trick where if it looks like you're about to be overwhelmed you can ESC out and back to the main menu and select Continue to keep playing from the start of the block you were up to, and it will randomly design a different layout which may be easier. Using this trick you are sure to be able to complete these achievements.

Grand Theft Auto
Open 20 vehicles.
You can only open the back-doors to vans. Any time you see a Van, click on it and the back doors should swing open. You can farm these (you will need too) quickly by playing Act 1 Chapter 5 until the part where there is a van and a crane. Open the van doors and pause-restart the block repeatedly as needed.


Boom! Headshot!
Shoot 10 zombies offmap with Sniper items.
This just means to use sniper weapon pickups on zombies that are hanging out outside of the playing field. They are still on the "map," It means the zombies that charge in from the sides to bite your survivor pieces. This one you should get by the end of the Campaign and certainly by the end of Survival.


George Metesky
Kill 5 non-Zombies with a single grenade
Pretty straightforward. Use a grenade weapon powerup to kill a group of survivor pieces and no zombies.


Oh, the Humanity!
Kill 8 or more survivors with a single air strike.
You will be able to get this in the later levels or in Survival. Just keep an eye out for a long row with 8+ survivors in it and bomb them. If it is longer than 8 units and there are some zombies mixed it, it still counts.


Grande Surround
Surround 15 zombies at once.
For these mega-kill style achievements, you'll want to just focus on building a large perimeter around the zombies in any of the larger, later levels. You can build the perimeter and wait for the zombies to spread and then finish them off. Pretty simple.


Venti Surround
Surround 20 zombies at once.
For these mega-kill style achievements, you'll want to just focus on building a large perimeter around the zombies in any of the larger, later levels. You can build the perimeter and wait for the zombies to spread and then finish them off. Pretty simple.

Oops!
Kill 10 Survivors

Friendly Fire
Kill 100 Survivors

For the Greater Good
Kill 500 Survivors

Epic Oops!
Kill 1,000 Survivors

The weapon powerups and level-specific hazards in this game deal friendly-fire damage. You will have to go out of your way to kill friendlies to get 1000, and you will have to farm a few probably once you're done with the Campaign and Survival. There are several blocks in the campaign which have special things you can interact with that will cause a huge AOE level-specific hazard (like a falling sign or exploding car), you can pick one of these and trigger the object and then pause-restart the block over and over to quickly finish up these achievements.

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Zombie Butcher
Kill 100 Zombies

Zombie Assassin
Kill 500 Zombies

Zombie Murderer
Kill 1,000 Zombies

Zombie Massacre-er
Kill 5,000 Zombies

Zombie Tickler
Kill 10,000 Zombies

You will definitely need to farm many kills once you've completed everything else in the game. You can replay the campaign or survival modes to do it, or you can find a level-specific hazard to trigger and pause-restart the block over and over to quickly get kills. Arguably the best way to do this is to play Act 2 Chapter 4 up to the part where you start the generators and the snipers take out all zombies. The block immediately after you start the generators will consist of all zombies getting head-shotted by off screen sniper fire... once the last zombie gets hit before the checkpoint triggers quickly pause-restart the block and the snipers will shoot all zombies again. Repeat this as long as needed to finish grinding the 10,000 kills.

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