For one day only Techland is releasing a one day mod that will give players super strength to fight off the evil zombie horde.  A note from the Global Relief Effort states:

“In an emergency broadcast, the Global Relief Effort has urged the survivors of Harran to use extreme caution when handling Antizin injections,” a press release reads. “The latest batch of Antizin has been exposed to a foreign contaminant. The chemical in question is non-toxic, but anyone affected might experience odd side-effects for up to 24 hours.”