hose already knee-deep in Left 4 Dead 2's Southern undead will be familiar with Jimmy Gibbs Jr, who is only the greatest stock car racer of all time. Or shall we say, was.

Enterprising modder samm5506 was digging around in Left 4 Dead 2's code the other day when he stumbled upon a zombie model not found within the game itself. Dropping it into a level, he found it was none other than Mr. Jimmy Gibbs Jr. himself, who aside from being a particularly tough zombie, also brings out a few custom one-liners from the survivors, like Nick's "God damn that Jimmy Gibbs Jr.!".

To drop Gibbs into a game (PC version only, naturally), enable the console, then from the main menu enter these commands:

map atrium
sv_cheats 1
z_forcezombiemodelname common_male_jimmy
z_forcezombiemodel 1

Things go south in Valve's uncharacteristically quick follow up to last year's cooperative multiplayer shooter Left 4 Dead, as the walking dead creep below the Mason-Dixon line—where four new Survivors, immune to zombie-ism—seek solace form the infected hordes.

Left 4 Dead 2 follows the bloody struggle of four random strangers as they fend off new "Special Infected" super-zombies en route from Savannah, Georgia to New Orleans, Louisiana. They do so over the course of five campaigns, armed with new melee weapons, a larger selection of guns and grenades, and new personalities that make them distinct from the original's fondly remembered quartet.