Nope and that would be a dumb idea too sorry:(
its single player and multi player.
Single player?
No. You can play split-screen with a friend on versus. But if you are wanting to play online, you obviously need Xbox Live.
no
i think it is
Yes, in the co-op or single player campagin.
Left 4 dead, Left 4 dead 2. Zombie apocalypse on the xbox arcade. Call of duty black ops and world at war has a zombie mode. Red dead redemption has a zombie add-on for multilayer and single player
Only if you want to play online with other people otherwise theres a single player with A.I
Nope, you have to be online, or if more then one person is playing you both must be online
Yes
To receive campaign achievements, you must complete the entire campaign from start to finish on either single player (split screen) or campaign mode.
Yes!