you got to keep knifing people.
you need 50 harriers
You unlock it by getting to 10th Prestige.
2nd prestige
Call in 50 Pave Lows.
Ten Tactical Nukes to unlock the emblem.
by killing someone with a ten or more killstreak that's for the emblem
how do you unlock Municion viva on call of duty modern warfare mobilized
to get the harrier moving emblem you have to call in 50 harrier strikes.
Kill 300 people who are still dazed by a stun grenade. You must be prestiged to unlock this.
Completing the challenges you unlock through the levels. Some Titles and Callsigns can only be unlocked after you pretige.
Be 10th prestige
25
Get to 10th prestige, unlock everything (challenges, emblems, titles, weapon challenges and camos, etc....)