What better way to celebrate VD than trying to avoid an infection, eh, Valve? Valve Software original source --- This Friday the 13th brings us a little closer to the zombie apocalypse. Whether or not you're superstitious, Left 4 Dead is 50% off this weekend only. So grab a shotgun and make a run for the next safe room. It's the zombie apocalypse. Bring friends. --- w00t. Time to lug my PC to buddy's place to get this game. Yay!