*Shrug* i just feel like it fits the picture and is a good way to start it. With the end of the one who created them trying to stop it. Giving it a more helpless feel (which once you hit that point in zombies you really realize how hopeless it is but you still press on to try and save humanity I.e self preservation and human nature at its finest making this the best zombie "game" ive ever played) I vote when its all over treyarch releases all the maps on one single disk and makes it more story oriented instead of an extra (like you live till a certain round,or until all easter eggs or story line important things re found, and unlock the next map )