Modern Warfare 2 is a mostly serious, mostly reality-grounded first-person shooter. You might be surprised to hear then, that there could've been aliens and zombies in it.
That's according to Modern Warfare 2 writer, Jesse Stern, who's discussed with Gamepro his outlandish initial ideas for the big sequel.
"In the beginning we talked about having things in Modern Warfare 2 like outbreaks, viruses, chemical warfare, and even outlandish things such as aliens and the living dead," he revealed.
"We worked our way through it before we finally ended up with a more grounded version of the real world as it's depicted in Call of Duty: Modern Warfare 2. And as we were kicking around scenarios for conflict, we kept stumbling into things that were happening in real life, which was honestly unintentional."
You might joke, but it's clear that the community want to see more zombies in their Call of Duty (the multiplayer bit at least, anyway). We can't see it happening somehow, not until Treyarch turns up again, anyway.