As much as I too want a full COD Zombies game, I realized why it would be difficult. Especially for a zombies campaign.

Nightmares should us what would it look like and I feel it would be very poor. Zombies are fun enemies but they’re also repetitive. That’s where the problem lies-repetition. If a COD Zombies game was made, campaign would feel repetitive with few enemy varieties here and there. The whole theme of Call Of Duty is fighting wars and wars mean soldiers. Campaign is built to be a linear but at times non-linear experience. Zombies wouldn’t put much of a challenge compared to enemy soldiers. The whole gameplay would boil down to “go here and shoots zombies then leave” Plus the maps would be too small and sections wouldn’t last long.