The War Z was pretty unsuccessful critically, but it got a lot of sales. That was until Steam removed it from their service and stopped people spending their hard-earned cash on something that was in no way as described. Then the people behind the film World War Z decided that perhaps the names were a little too similar and demanded that The War Z became something else.
Today that new name has been announced, and it's not nearly as easy to slip off the tongue as the original name. If nothing else, Infestation: Survivor Stories will give the developers a new chance to trick people into buying the same game all over again.