Killstreaks are active abilities that you can activate after you amass the amount of kills required to activate them.
Each class can use two different types of killstreaks. Some killstreaks are Offensive, others Are Defensive, and the Utility based killstreaks are the silver lining.
You don't have to use a killstreak as soon as it's available. The AI however, use their killstreaks as soon as they become available.
There are different skills that affect how fast you charge up your killstreak, and how long it lasts such as the Headset Equipment, the Long Lasting upgrade.
List of Killstreaks
"I'm the Juggernaut"
Pages in category "Killstreaks"