These are the currently available achievements in the game:

First Blood

Defeat an enemy.

What is THAT!?

Kill a vicious dog.

Master of Nothing

Collect 25 different weapons.

Axe A Question

Defeat 5 enemies using a fire axe.

The Genocide's Genocidist

Kill 2500 enemies.

WHIPCRACKER

Take out 5 enemies using an Indiana Jones style whip while wearing a cowboy hat as well.

Field Medic

Heal a total of 1000 HP on other players.

Hemophiliac

Collect 15 blood packs

Professional Carnie

Get 50 kills with a throwing axe.

Hammer and Nails

Barricade for more than 2500 hit points

Can We Fix It?

Barricade for 1000 HP using items

The Good Samaritan

Rescue 10 random strangers from Zombies

Got Your Back Jack

Rescue 25 clan mates. Bitches Be Crazy!

The 200 Club

Level up your character to level 200

Maxed Out

Max out by earning 200 skill points for each skill.

Well Fed

Eat more than 500 pounds of food.

Diabetes

Eat 10 Twinkies

Sushi Connoisseur

Enjoy some fine dining and eat 50 rotten fish

Caffeine High

Get a Buzz! Drink 25 Buzz Energy Drinks

Pumpkin Eater

Cheater Cheater 5 Pumpkin Eater