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