you level up and earn them all
you have to get kills on your friends or on wifi the more kills the more guns
you have to get kills on your friends or on wifi the more kills the more guns
You unlock it at level 36.
You cant.
you can unlock it with you're first killstreak award unlock
No.
you have to reach level 50
Get to Prestige 9.
you cannot unlock zombie mode in modern warfare. Zombie mode is only avalible in black ops.
You unlock it by getting to 10th Prestige.
you cannot unlock them you have to buy them on PSN or LIVE Marketplace