Activision has issued a short clip teasing the much-touted and highly-anticipated zombie mode in their upcoming first-person shooter Call of Duty: Black Ops 2, which arrives on 13 November for the PC, Xbox360 and PS3. The short image trailer shows a bus pulling up to a stop and the doors opening welcoming us…or is it the zombies..aboard, following which we see brief flashes of  zombies running towards and hanging on the sides of the moving vehicle while attempting to break through its boarded-up windows. The zombies mode is easily the fan favourite and arguably the best part about the previous game, so we are interested in seeing how the developers intend to add/improve on it. The full video will receive a world premiere on 26 September, so we gotta wait until then.