As part of the Call of Duty franchise’s desire to stress realism, the introduction of a zombie mode has been a long-running favorite of first-person shooter fanatics.  With the undead set to make a return in Call of Duty: Black Ops II, developer Treyarch is prepping to unveil the newest iteration of this mode, beginning with a teaser video.

The trailer, which you can view below, is more a primer for the full reveal of Call of Duty: Black Ops II Zombies, which is set to make its debut on September 26.  For now, this quick trailer hints at quite the desolate experience, which may even be mobile if the focus on the bus is any indication.

Watch the trailer, prime your zombie hunting skills, and stay tuned for more news about the mode as Treyarch reveals it.