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Along with a new campaign, (hopefully) improved multiplayer, and a new co-op mode called Strike Force, Treyarch's next Call of Duty title, Black Ops 2, brings the fan-favorite zombie mode back into the mix. While the zombies mode has been pretty straight forward since World at War, Black Ops 2 is attempting some pretty revolutionary things with the mode.

It's not outright explained in the debut trailer above — merely suggested by it — but the new zombie mode for Black Ops 2 will feature a story-based campaign called Tranzit. Teams of up to 4 players will be able to explore a significantly more open game world, and travel to various zombie "arenas" via the bus seen in the trailer.

However, the battling doesn't stop whilst the team is in transit, it only gets much more confined and presumably more stressful. As the player travels from map to map they will be looking for new dangers, and uncovering more of the mode's story. According to Treyarch's Mark Lamia, the events that took place in Black Ops 1's zombie map Moon will significantly impact the story of Tranzit.

Additionally, players will be able to construct their own crude weapons, like the makeshift riot shield seen in the trailer, which can also serve as a rudimentary form of mountable cover. Treyarch also promises that some of Black Ops 2's futuristic weaponry will make an appearance, but unfortunately that's merely teased in the trailer.

A new, connected zombies multiplayer experience would be enough to demarcate Black Ops 2's offering as a "fresh" and "new" take on Zombies, but Treyarch is taking it a step further with a new competitive mode. Called Grief, this new mode pits two teams against each other in a battle for survival.

Black Ops 2 Zombies Trailer

The mode is not a zombies versus humans mode in the vein of Left 4 Dead, though, the teams are still trying to survive against an AI controlled zombie horde. However, the two teams can reportedly grief (HINT HINT) each other in a number of different ways, in an effort to ensure they survive and their opponents do not.

Treyarch has certainly come a long way since the Zombies easter egg in World at War, transforming the mode into a major selling point for the developer's Call of Duty titles. While Tranzit and Grief will most likely play second fiddle to competitive multiplayer, it's good to see some new and enticing features are in store for fans.

What do you think of Black Ops 2's new Zombies modes? Is Treyarch doing enough to make this year's iteration compelling?

Call of Duty: Black Ops 2 releases November 13, 2012 for the PS3, PC, and Xbox 360; and for the Wii U on November 18th.