Here is the full list of all 11 Zombie Office Politics achievements.
Recycle at least 10 items
Follow the signs to Accounts
Discover your first recipe
Purchase 10 items from vending machines
Defeat the first boss
Drink a latte
Take the shortcut to IT
Complete the game
Bring down 10 headless exploding zombies before they reach you
Teleport 20 chairs
Find Doris the Dinnerlady's gardening gloves