A Week To Live
Complete 7 days in any game mode without dying
25 ✓ September 15th, 2010
Can't Touch This
Rack up a 100x multiplier in any game mode
20 ✓ September 15th, 2010
Interior Decorator
Kill 25 zombies in any game mode using environmental hazards
20 ✓ September 10th, 2010
Tour of the City
Complete each arena at least once in the same game in any game mode
15 ✓ September 10th, 2010
More the Merrier
Kill 10 or more zombies at the same time in any game mode
10 ✓ September 11th, 2010
Environmental Awareness
Kill a zombie using an environmental hazard in any game mode
5 ✓ September 10th, 2010
Gas Powered
Complete an entire arena, getting every kill with the Chainsaw
5 ✓ September 12th, 2010
Socialite
Play in an online multiplayer game
5 ✓ September 10th, 2010
Anniversary of the dead
Complete the Final Day, in either Single or Multiplayer, and finish the game
45 
Hotter Than Hell
Complete the final day of the "7 Days of Hell" unlockable mode
25 
Friends in Low Places
Save 25 survivors in any game mode
20 
Gun Shop
Kill at least one zombie with each weapon type in any game mode
5