The job of The Replacer becomes ever more difficult as the next wave of Call of Duty: Black Ops 2 downloadable content makes it’s way to gamers this April 16. But, that’s okay – he has help.

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On April 16, Black Ops 2‘s second DLC, Uprising, will become available to Xbox Live players first, later for PlayStation 3 and PC users. It includes four brand new multiplayer maps – Magma, Encore, Vertigo and Studio – as well as a fresh new Zombies experience Treyarch is calling Mob of the Dead.

Speaking of the dead, a 6-minute behind-the-scenes video of Treyarch’s latest and most ambitious Zombies experience was recently shown to Xbox Live players viewing the recent Call of Duty Championship events from their consoles. We’ve got the entire thing for your viewing pleasure below.

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Mob of the Dead places you in the shoes of four prohibition-era mobsters, Billy Handsome (Liotta), Al “The Weasel” Arlington (Pantoliano), Salvatore “Sal” DeLuca (Palmentiri), and Michael “Finn” O’Leary (Madsen), who are serving time in Alcatraz Prison only to discover that being behind bars is the least of their problems.

According to Treyarch, your goal is to assemble a plane using parts in order to get yourself off the zombie-infested island. You’ll be spooked with “contextual music” as you fight new types of crazy zombies on top of the hoards you’re used to, but sometimes in a way you might not be so used to, thanks to the newly introduced Afterlife mode.

Pretty quickly, you’ll notice a brand new heads-up display, as well as the use of classic Civil War weaponry. You’ll also see a new type of perk: the Electric Cherry, which zaps zombies with electricity while you reload.

Pretty scarey/exciting stuff. What do you guys think so far of Treyarch’s latest Zombie creation for Black Ops 2?