EMP

"We've been EMP'd! Electronics are down!"

- Said by a Spetsnaz Announced that has been hit by an EMP.

The EMP (ElectroMagnetic Pulse) is an unlockable killstreak reward in Call of Duty: Modern Warfare 2. Requiring a killstreak of 15, or occasionally found inside a Care Package, the EMP disables all enemy electronics. Hostile players will have no HUD, and electronic scopes (such as the Red Dot Sight) will be disabled. Their vision will also be slightly fuzzy. Any enemy sentry guns will be destroyed and all hostile aircraft will crash. Enemy players will be unable to activate their own killstreaks while they are affected by an EMP. The EMP effects last for 60 seconds, but does not affect friendlies.

An EMP is featured in the single-player missions Contingency and Second Sun, halting the Russian advance in the Russo-American War.

Effects of the EMP
Any other active killstreaks other than a Tactical Nuke the player has will be destroyed in the initial explosion when the EMP is activated.

The following will happen to enemy players:



Player View

 * Vision becomes fuzzy.
 * Entire HUD disappears, including radar, hip-crosshairs, ammo counter, game score, and timer.

Weapon Attachments

 * Red Dot Sight - "Red dot" disappears (exception - the F2000)
 * Holographic Sight - Targeting reticle disappears.
 * ACOG Scope - Red cross hairs disappear, but the black cross hairs remain.
 * Thermal Scope - Thermal vision is disabled, but crosshairs remain, essentially becomes a standard sniper scope.
 * Heartbeat Sensor - Inoperative, static fills the screen, no red or green dots.

Weapons

 * Stinger - Unable to lock on or fire.
 * Javelin - Unable to lock on or fire.
 * AT4 - Unable to lock on to enemy vehicles, though still able to fire in free aim.

Killstreaks

 * All killstreak rewards will be destroyed if they are active at that moment, but the Emergency Airdrop C-130 cargo plane will be unaffected and still proceed to drop its load.
 * No killstreak rewards can be activated during duration of an EMP.
 * The Tactical Nuke is a unique case. While an EMP is active, the nuke cannot be activated. However, if the nuke has already been launched, the EMP will not disable it, and the countdown will continue until endgame, presumably because the nuke has already been launched, so nothing can stop it.
 * An EMP will prevent a stealth bomber from releasing its payload, but doesn't destroy the plane itself.

Equipment

 * Claymore - Will not detonate if tripped, but the trip lasers remain active. Can be shot to explode
 * C4 - Remote detonator is disabled, but can be shot to explode.
 * Throwing Knife - Falls down to to the ground.

Trivia
thumb|340px|left|A user-made montage on earning the coveted EMP emblem.
 * Strangely enough, EMPs are very seldom used. This is possible maybe because people prefer to use killstreaks that actually kill or because it is such a high killstreak.
 * Although all electronics go down, strangely the team announcer will still be able to announce an enemy EMP was used.
 * If the player listens carefully, all other enemy killstreaks that get announced make a radio "beep" sound followed by the killstreak being said. The EMP announcement does not make a radio sound, so it could be that it is not actually the announcer saying it but a nearby teammate. This is also indicated by the fact that the announcer/teammate says "We've been EMP'd!"
 * An EMP does not affect the digital wrist watches worn by some of the forces like the Rangers..
 * If the player looks outside the map immediately after an EMP is deployed (by either team), they can see a nuclear explosion identical to the one seen in Second Sun in the distant sky. However, to actually drop a nuke on the map itself requires the 25 killstreak Tactical Nuke, 10 kills more than the EMP.
 * It is odd that setting off an EMP does not affect Semtex as it has an electronic detonator on it.
 * It is also odd that the ACOG is affected by the EMP, as it doesn't use any electricity in real life.
 * The EMP in Call of Duty: Modern Warfare 2 is classified as the E1 component of an EMP, as the E2 component is more lightning-like, and the E3 component has a much slower pulse.
 * The EMP is the highest killstreak available in a Care Package. There is a 0.87% chance of getting one.
 * The title obtained when completing "Blackout: II" is called "Starfish Prime," which was a high-altitude nuclear test that caused a resulting EMP to affect most of Hawaii.
 * Using two EMPs will complete the Blackout I challenge, unlocking the callsign "Chick Magnet."
 * It is strange that the Throwing Knife is affected by an EMP, since it isn't an electronic device.
 * If an AC-130 is being used by a player at the time of the EMP detonation, the player is forced to stop controlling the plane and will come back to their body. The AC-130, however, will remain above.
 * The EMP along with the UAV and the Counter-UAV are the only killstreak rewards that cannot kill an enemy.
 * A friendly EMP used in conjunction with a Chopper Gunner or AC-130 is a deadly combination, as enemies won't be able to use lock-on missiles to shoot down the gunships. A good strategy for obtaining a Tactical Nuke is to try and get 4 more kills and call in an EMP before using the players gunship, as you only need 10 more kills once you've got the EMP, and your gunship is very unlikely to get shot down.
 * An EMP can be used as a good anti-air support killstreak instead of a launcher. This will benefit your team further in team games as well.
 * The EMP is probably it's most useful in long objective based team games such as Sabotage, Domination, Demolition and Headquarters where the enemy will use killstreak rewards to support their team and help them obtain the objective. The EMP will destroy current enemy killstreaks airborne and prevent them from using anymore during the duration of the EMP, while your team can freely use killstreaks. This can be beneficial for your team and turn the tide of a game. The enemy will find it much harder to defend against your team's killstreaks as lock on missiles will prove ineffective. They will also find it more difficult to spot harriers, helicopters, predator missiles, etc. because the radar is temporarily disabled.
 * The EMP is perhaps most effective in third-person game modes; if EMP'd, you will have little ways of aiming your weapon and the reticle used disappears.
 * If a friend is using a Predator Missile, activating an EMP while they are doing so will cancel it.
 * EMPs are useful in Ground War matches as it is very hectic and many Killstreak Rewards may be in the air.
 * The EMP in game is what is called a High-altitude EMP. They are known by the term HEMP, perhaps this was dropped for simplicity or to avoid another drug reference.
 * When an EMP goes off, it temporarily blinds everyone on the map.
 * It is unknown how the same electronics affected by an EMP come back and start working again since electronics affected by an EMP are permanently disabled. In reality, the team affected should never be allowed to use electronics again (affecting the rest of the match similar to how a Tactical Nuke ends an entire match). However, this was probably done for balancing reasons, as the bridge between an AC-130 and the EMP is minimal, and having complete loss of HUD in the match would result in matches ending VERY quickly.
 * As mentioned above, any electronics affected in the EMP that affected D.C. in Second Sun will be completely disabled leaving D.C. as more of a third-world city rather than one found in a developed nation such as ones found in America for years to come.
 * The U.S. Army Rangers, though they know what an EMP is, seem completely ignorant to its capabilities, though it is possible they don't know what is going on
 * Price himself doesn't seem to know exactly what an EMP can do. If he did, he might have tried to find another way to end the war as an EMP would cripple America for years making them more vulnerable to further attacks from their enemies (and Price wanted to save them). Technically, therefore, Price could be labelled as an enemy and terrorist of the U.S. as well as TF141 for helping him in these actions. However if is possibly a refence to the saying "Desperate times call for desperate measures." That is often done in the rest of the single player story or Price could simply have just been getting revenge on Russia.
 * Even though the game implies that D.C. was the only affected area by the EMP (it is the only city known to be threatened to be bombed, but this might also be because the bulk of the war is in D.C.). In reality, far more than D.C. would have been affected (all of Virginia and Maryland are guarantees as well as much of the East Coast if not all of it). The exact radius of the explosion is unknown, however, as not much information is given about the EMP that was used in the campaign (though it is implied to be a bigger one).
 * It is unknown how an EMP doesn't affect the team that calls it in except that the developers didn't want to have such a high killstreak reward also cripple the team that called it in.
 * All of the TVs in every map will stay on during an EMP.
 * In Terminal, it is strange that the metal detectors still work during an EMP.
 * The EMP along with Counter-UAV and Tactical Nuke are the only 3 killstreaks that directly effect all opposing players