Twice the zombies equates to twice the fun.  It’s a story as old as time.  Of course, in this scenario, “time” is best understood to be a “mutant form of disease that makes the living shuffle the Earth.”   But, let’s not get bogged down in semantics.  Left 4 Dead 2 builds on the phenomenally splatter-happy success of the first game in the series with “four new "Survivors" through the southeastern region of the U.S., from Savannah, Georgia to New Orleans’ French Quarter. The game adds melee combat, new monsters and weapons.”  It’ll be available for purchase this November for $60