Zombie Apocalypse Cheats

Achievements
Complete each achievement to get the allotted gamerscore.

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
Can't Touch This (20): Rack up a 100x multiplier in any game mode
Environmental Awareness (5): Kill a zombie using an environmental hazard in any game mode
Friends in Low Places (20): Save 25 survivors in any game mode
Gas Powered (5): Complete an entire arena, getting every kill with the Chainsaw
Gun Shop (5): Kill at least one zombie with each weapon type in any game mode
Hotter Than Hell (25): Complete the final day of the "7 Days of Hell" unlockable mode
Interior Decorator (20): Kill 25 zombies in any game mode using environmental hazards
More the Merrier (10): Kill 10 or more zombies at the same time in any game mode
Socialite (5): Play in an online multiplayer game
Tour of the City (15): Complete each arena at least once in the same game in any game mode