Zombie Apocalypse XBox 360 Game cheats,secrets,codes and keys

Zombie Apocalypse

Achievements:
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Accomplish the indicated achievement to get the corresponding number of
Gamerscore points:

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