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
You unlock it by getting to 10th Prestige.
you can unlock it with you're first killstreak award unlock
ak47
Level 48
Do the challenge "Ultimate Sacrifice" which you unlock be nuking the enemy while you are losing
You get it all at a certain level
Unlock the challenges for them.
2nd prestige
lv.70
Level 22 :)
cmplete challanges