Sep 27, 2010 07:48 GMT  ·  By

Call of Duty: Black Ops, the first person shooter developed by Treyarch and set to appear in November is once again seeing a potential Nazi Zombie Co-Op mode rumored, thanks to teases from studio executives and retail listings.

Call of Duty: Black Ops is by far one of the biggest releases of the end of the year, and will no doubt follow in the successful steps of last year's sales phenomenon Call of Duty: Modern Warfare 2.

But while that game went all out with realism and an intense multiplayer mode, Black Ops will take a bit more tongue-in-cheek approach, at least in terms of the multiplayer mode, as Treyarch wants to maximize the success it had with the Nazi Zombie Co-Operative mode it featured in its previous Call of Duty title, World at War.

For those not in the know, World at War allowed players to play co-operatively with friends in a variety of scenarios against an army of computer-controlled Nazi Zombies.

Even though it sounded a bit ridiculous, the mode was a huge hit, with many trying to see how long they could resist against the undead horde.

Now, with Black Ops set to arrive soon, there have been plenty of rumors concerning a possible Nazi Zombies mode, even though the game's single player action takes place at the height of the Cold War in 1960s and 1970s.

The first detail came from a Twitter post by Treyarch community manager Josh Olin, who promised that a big co-op reveal will be coming soon, but declined to reveal anything else.

The second big thing that points to such a mode being real is a description of the official Black Ops strategy Guide from BradyGames.

It says that besides information about the single and multiplayer modes of the game, the guide also has coverage about the Nazi Zombie mode, and other co-op features.

With such evidence pointing towards this co-operative multiplayer mode, it seems that Treyarch only needs to come forward with a statement and make everything official.