A number of dirt-digging zombophiles have unearthed a pair of suggestive errors buried within the code for the Left 4 Dead 2 PC demo. These error messages are meant to appear after a player has been kicked from an online multiplayer match after failing to load a DLC map that the match host has selected for play. These disabled messages seem to indicate the names of what many now believe to be two DLC releases planned for the future: The "Miracle Pack" and the "Apocalyptic Pack."
_____________
source : Joystick