If you're wanting to play with others then you will need Xbox Live, however, if you're wanting to play by yourself and do a local match, then no; you do not need a membership.
No
yes co op or single player
You couldn't without VERY advanced technology.
its fun without xbox live cuz you get spec ops and single player story but its more fun with xbox live!!
zombies are not angry. and im not sure, but i dont think they live forever.
yes, if they are on the same xbox - split screen
You can play it solo, or on split screen.
they are not live
Zombies are never actually 'alive', they are simply reanimated corpses. but no there are not going to be any zombies. :)
They attract to live, beating hearts. And also, ZOMBIES DONT EXSIST!
You can play single player zombies without Xbox Live, but you can't play online with other players unless you have Xbox Live.
if u have 4 xbox controllers and 4 m8s then go on multiplayer or cooprative and go on splitscreen and play nazi zombies =) i think!?