In order to unlock classes 6-10 you must prestige.
In Black Ops multiplayer you unlock the AK-47 at level 38.
3arc unlock
type in 'doa' on that computer or '3arc unlock'
You unlock gold camo in black ops, when you reach prestige level 14, level 25.
41
You have to get to level 44 and then pay the $2000 to unlock it
When you rank up to level 35 you will unlock it.
You need to unlock the weapons.
you unlock more emblems
Samantha shes in black ops but only on moon you can unlock her.
You get to level 50
3arc unlock