You must do these 3 things with Hardline equipped;
1. Share 10 care packages - This can be done with any form of care package not
just the 5 kill streak. This means that Sentry Guns and SAM turrets also count towards this.
2. Earn a 7 Killstreak in a match - Simple enough, kill 7 enemies without dying.
3. Earn 7 different killstreaks in a match - Not to be confused with the above, basically you need to earn (Not use, just obtain) 7 different killstreaks in one match. Easy way to do this is equip a Spy plane, Counter-Spy plane and Care Package.
Hardline Pro is the ability to change a carepackage once - ANY carepackage weither it's yours, a team-mates or an enemies.
Keep in mind that SAM turret package and Sentry Gun package can also be changed (3 kill streak for SAM turret with Hardline active) which means you could get a gunship for a 3 kill streak!
Hope this helps.
P3 ynvscorpio
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
When you rank up to level 35 you will unlock it.
You have to get to level 44 and then pay the $2000 to unlock it
You need to unlock the weapons.
Samantha shes in black ops but only on moon you can unlock her.
you unlock more emblems
3arc unlock