Complete the painfully slow, forced tutorial. Finish the level 'Welcome to Punchbowl'

Now you're getting the hang of it! Finish the level 'Bleeding Ground'

Give Stubbs a hand! Finish the level 'The Slammer'

Do it for the meme! Finish the level 'Cop Rock'

We know what you did. Finish the level 'Painting the Town Red'

Sooey! Feedin' time! (Defeat Jumbo)

So many deals! Finish the level 'Punchbowl Maul'

You look good in those genes. Finish the level 'Fall of the House of Otis'

Soil the water supply with your finely aged urine. Finish the level 'When the Zombie Break'

Neither rain, nor sleet, nor bullets, nor brains. Finish the level 'The Sacking of Punchbowl'

Mahlzeit (Defeat Dr. Wye)

Eh, shake it off. Finish the level 'The Doctor Will See You Now'

Clear your calendar. Finish the level 'Paved with Good Intentions'

Bon apetit. Finish the level 'The Ghoul of Your Dream'

It's been 15 years. You ate your first brain. Was it worth it? Difficulty: Any Level: Welcome to Punchbowl Eat a Brain. Part of tutorial.

Get run over by a vehicle. Difficulty: Any Level: Any Let the Police car that spawns at the start of 'Painting the Town Red' hit you. You can do this earlier in 'Bleeding Grounds' too by an enemy controlled Sod-O-Mobile.

Get killed by an airstrike. Difficulty: Any Level: Paved with Good Intentions At the start of 'Paved with Good Intentions' stand in road and try to catch an incoming missile.

Load a jeep up with the squad. Difficulty: Any Level: Paved with Good Intentions/Any with Jeep Can be completed at the start of 'Paved with Good Intentions'. An enemy may steal the Jeep at the start of the level but will immediately either crash or be hit by the airstrike (you can kill him with a well placed Gut Grenade). Get in and let a zombie get into the passenger seat. This can be completed on any level with a Jeep. Also, you only need a single passenger.

BOOM! HEADSHOT! Difficulty: Any Level: The Slammer Possess an enemy and then shoot another enemy in the head. The first oppurtunity to do this is in 'The Slammer' when you first take control of Stubb's hand and enter the vents. Go straight all the way until you drop into a room with a single cop. Possess him and watch the left door as possessing him will trigger the door to open and another Cop will walk in. Shoot him in the head. (This can be completed at any time anywhere afterward.)

Trigger a Gut Grenade in mid-air. Difficulty: Any Level: Any Throw a Gut Grenade. Press the same key/button while it's in mid-air.

5 Tractor Kills Difficulty: Any Level: Fall of the House of Otis An enemy will crash an 'Impala' (tractor) into some hay bales just after the sheep pen. Get in and run over every enemy you see along the way. You can also play on Easy and rush the vehicle leaving enough enemies close by.

10 Tank kills Difficulty: Any Level: Paved with Good Intentions Steal the Tank in the level 'Paved with Good Intentions' by using Unholy Flatulence next to it (forces the soldier out). Then kill 10 soldiers. If you play on Easy you can leave some alive to kill as you progress through the end of the level.

You shouldn't pet the sheep. Difficulty: Any Level: Fall of the House of Otis Jump into the pen and use 'Unholy Flatulence'... ...or you can just break the gate and kick one. If you follow the fence behind the nearby building you can walk behind some trees and find a man chasing a sheep around a bale...save the sheep and you'll get a surprise. *image coming soon*

Get killed by a robot. Difficulty: Any Level: When the Zombie Breaks/Any with Robots As soon as the level 'When the Zombie Breaks' starts turn right and there are two robots standing at a water cooler contemplating their programming. Walk up and start attacking them until they either fight back or explode and kill you. Either will pop the achievement. This can be done at any time on any level with robots.

Stun 10 enemies with your Unholy Flatulence Difficulty: Any Level: Any The quickest way to knock this one out is to play 'Bleeding Ground' on Easy, as it makes you a bullet sponge and can easily herd Scientists and Cops together. The scientists will follow you. Cops like to backpedal so position yourself in a way that makes them do this into walls.

10 Sod-O-Mobile Kills Difficulty: Any Level: Bleeding Ground At the start of 'Bleeding Ground' hop into the Sod-O-Mobile and kill 10 enemies.

Land a jump tackle. Difficulty: Any Level: Any Jump and Attack someone in mid-air.

10 kills with a single Sputum Head Difficulty: Easy Level: Painting the Town Red First - your own zombies count for this. Use that to your advantage. The first opportunity to get this one is when you get the ability. You need to 'zombify' all of the Cops on the very same floor BEFORE triggering the cutscene (note the red car). Try and have them grouped just before the door by whistling and the Riot Cops that spawn should aggro your zeds immediately. Pop your head off and let the good times roll. *will be updating the images with gifs once I get a good clip

You're a zombie that died. Difficulty: Any Level: Any ...die. Pick your poison.

Posess each type of enemy once. Difficulty: Any Level: Any Cop Civilian Farmer Security Force (Quartet Guys) Soldier (Non-Helmet) Scientist Fairly straight forward. Just possess each enemy as you play. From the looks of it you do not need to possess the variations. I intend to extend on this to make it easier/faster but want to verify the levels in which they appear first.

Beat the game in under two hours. Difficulty: Any Level: All FAR easier than you expect. Play on Easy and simply run through the levels skipping the cutscenes. I finished in an hour and 17 minutes on my first attempt (been awhile...) and that includes a few mishaps so don't stress yourself out just make sure you have the time to play and have a general idea of the maps.

100% the dance battle. We thought that was impossible. The best advice I can give is to remember that you can pause the game after the Chief's turn and take a moment to write down or repeat the pattern a few times before unpausing.

Eat 2005 brains Difficulty: Easy Level: The Ghoul of Your Dreams Easiest way to farm these at the moment is the final boss on Easy (so you're a bullet sponge). As you spawn into the fight run into the two rooms immediately behind you and eat the brains of the 4 civilians then Pause - Load Checkpoint - Repeat. Or you can just continue playing running back and forth between the rooms until your horde overwhelms the boss (which could make you restart the level entirely). You can see an example of this in the gif used with 'SIX SEASONS AND A MOVIE'. Note that this achievement CAN break and will stop counting. I've had this happen MANY times (had to do an additional 300...) but it always seemed to start working again eventually.

Your friends all just read that achievement title. You need help. Beat the game on Insane difficulty. Simple. Best tips until I finish typing up my notes? Create hordes, take it slow, abuse Possession and focus specialty enemies i.e Heavy Weapons, Jetpacks etc. Note that some levels are designed in ways you can dodge and weave through checkpoints easily.

Demand a sequel. Obtain all other Achievements - should pop after finishing your second to last achievement (most likely Crypt-O-Currency).