I think that there should be Kid and Teenage zombies in the game. Why? It would give more of a realistic feeling to it and make the game a tad bit more fun in a way. If you think about it, kids and teens often have much more energy than adults do, so they can move faster and because of their size they can fit into smaller areas. Also, when you think about it realistically... If there was a zombie outbreak there would be many children so not putting them in the game would instantly kill off the feeling of realism... I mean Dead Space 2 did it, so what's the big deal if a zombie game did it? Once someone is infected, they die and THEN become a zombie. Meaning they aren't even human, just a parasite with a human appearance.