there's a certain amount of levels that you have to get to to unlock a certain amount of killstreaks
you lvl up and sooner or later u will get the chance to unlock a killstreak
if ou are on xbox then you press right on the d pad
i don't know about PC or ps3 as i don't have mw2 on them
it tells you right in the word KILL STREAK
3arc unlock
you can unlock it with you're first killstreak award unlock
To earn the Stealth Bomber emblem, you must call in 25 of them. Which is killstreak challenge 3.
by killing someone with a ten or more killstreak that's for the emblem
Yes anything that you don't call a care package for adds to your killstreak
MW3
Level Up so manny times and it will give you one. It will tell you how many level ups till you unlock one on the upper right hand corner.
October 12,2012
Yes of course!!
The best killstreak is the Tactical Nuke but use killstreaks that you can get frequently.
It is called the Tactical Nuke and you have to unlock that in the callsigns and killstreaks reward menu in online game play. It is a 25 killstreak reward!
You have to complete a certain challenge for this specific kill streak, you pretty much just have to call it in a certain number of times. To check how many times u need to get the killstreak go to Barracks>Challenges>Killstreaks and just complete them to get the emblem. Hope this helped!