The Apocalypse Challenge is based around restrictions that prevent the player from using many of the items, social menues and helps in the game in order to increase the difficulty of play. At the beginning of the challenge, almost EVERYthing is restricted, from how many times a day you can prepare a meal to what items in the Build/Buy menues you can use. As the player progresses through the challenge, these restrictions are lifted one by one, each by a separate member of the founding family.