Killstreaks

Killstreak rewards are special bonuses that can be acquired by killing a certain amount of enemies in a row without dying. You can lower the required amount by 1 with the Hardline perk. Modern Warfare 2 expands the killstreak system from Call of Duty 4 and World at War, as you are now able to customize your killstreak rewards to your liking. You can choose a maximum of 3 killstreaks. They stack up, meaning you don't lose a UAV after gaining, for example, a Predator Missile. Stacked up killstreaks can't be used as pleased, instead they need to be used from the highest level to the lowest. All killstreaks (except Airstrikes and the Predator Missile) can be shot down or disabled. Anyone you kill with a killstreak you deployed will be added to your own kills.

 

Kills Required	Name	Description	Additional Info.	Icon
3	UAV	This deploys a UAV (unmanned aerial vehicle) that shows the enemies on the radar as dots. The UAV can be shot down by the enemy.	This can be blocked with the Cold-Blooded perk.
4	Care Package	After you throw the red signal flare, the Care Package will be airdropped into the battlefield. This can be picked by anyone, even the enemy.	The package contains ammo or any random killstreak from an UAV to an EMP. The higher the killstreak the more rare it is.
4	Counter UAV	This disables the enemy radar for a short period of time, even if they don't have a UAV in the air.
5	Sentry Gun	Airdrops a placeable XM312 Sentry Gun that will automatically fire at enemies.	The sentry gun will not detect players with Cold Blooded selected. Sentry Guns can pitch up and down. Knifing the turret instantly disables it.
5	Predator Missile	This allows you to remote control a Predator Missile. After opening the laptop, you have approximately 5 seconds to control the missile to your target, as it goes down.	You can give the missile a boost to get it to your targets quicker. You are vulnerable while using the Predator Missile, but if you get killed, you can still continue to control it.
6	Precision Airstrike	This is much like the airstrike from Call of Duty 4, but this time you can control the direction of the airstrike for more accurate kills.
7	Harrier Strike	Airstrike with a hovering harrier. After dropping its bombs, the harrier will guard the area for a short period of time.
7	Attack Helicopter	Deploys a helicopter to the battlefield. It will circle the map and automatically attack the enemies for a few minutes and leave.
8	Emergency Airdrop	Airdrops 4 random Care Packages of killstreaks or ammo.	All of these are deployed around one flare so make sure it's really open.
9	Pave Low	This deploys a heavily armored Attack Helicopter (Sikorsky MH-53 Pave Low) to the map for maximum carnage.	The Pave Low flies lower, shoots more frequently, and is better protected than normal Attack Helicopters
9	Stealth Bomber	Calls in a Stealth Bomber (B-2 Spirit) to carpet bomb the selected area. You can also control the direction, just like with the Precision Airstrike.	The airstrike doesn't show on enemy radar.
11	Chopper Gunner	Be the gunner of an attack helicopter. The chopper will fly around the map and you can remotely control the 25mm gun with your laptop.	Unlike the AC-130, you never have to reload.
11	AC-130	After the AC-130 Gunship is deployed via laptop, it will enter the map. You control it remotely for 30 seconds and you can use the 25mm, 45mm and 105mm guns to shoot at enemies.	You have to reload after using a gun but have three guns to choose from.
15	EMP	Electromagnetic pulse or EMP for short. Temporarily disables any and all enemy electronics like the Thermal Scope, Red Dot Sight, etc.	The EMP also stops the enemy from using killstreaks.
25	Tactical Nuke	You get to drop a Tactical Nuke! It gives you and your team an instant win. The Tactical Nuke ends the match with a bang by killing everyone on the map.	There is a countdown for the nuke followed by a final moment of slow-mo before a bright light and then everyone dies.