Yes and no... You can do that "offline" but you have to have a friend or something along those lines playing as a human. But no you can not be infected by yourself.
yes
zombie mode is on ps3 you dummy
No. Unfortunately not
yes yes
Not on the same xbox/ps3 no unfortunately.
wa bybi
No
l4d2 it has more zombies and its more funner.
Buy both but i prefer L4d2 if you want to kick some zombie @ss and if you want terrorist @ss by Mw2 btw im buying mw2(on ps3) first then l4d2(probably PC)
No, it is not possible to clone a zombie kitten.
Yes, you can, but I'm not sure, if its possible to play with friends offline...
Zombies will attack anyone who is not a zombie. In this case the infection is an extreme variant of rabies, which causes violent behaviour in order to spread itself through fuids such as saliva.