The Full Metal Zombie Add-on for Gas Guzzlers Extreme has 15 achievements.
Survive the tenth wave of zombies in Defend the base or Survivor game modes
Survive the ninth wave of zombies in Defend the base or Survivor game modes
Survive the eighth wave of zombies in Defend the base or Survivor game modes
Survive the seventh wave of zombies in Defend the base or Survivor game modes
Survive the sixth wave of zombies in Defend the base or Survivor game modes
Survive the fifth wave of zombies in Defend the base or Survivor game modes
Survive the fourth wave of zombies in Defend the base or Survivor game modes
Survive the third wave of zombies in Defend the base or Survivor game modes
Survive the second wave of zombies in Defend the base or Survivor game modes
Survive the first wave of zombies in Defend the base or Survivor game modes
Kill at least 500 trolls
Kill at least 800 hyenas
Kill at least 1000 fat human zombies
Kill at least 15000 human zombies
Collect 10000 points repairing the base