Killstreaks

=Killstreak=

From the Modern Warfare 2 Wiki
A killstreak is when a player gets three or more kills in a row without dying. In Call of Duty 4: Modern Warfare, Call of Duty: World at War, and Call of Duty: Modern Warfare 2 the player is given various rewards depending on how long the killstreak is. Most killstreaks provide air support, but some, like the UAV and the EMP, can help the entire team in general.

Call of Duty: Modern Warfare 2
In this game, players can choose up to three killstreak rewards they can earn, rather than just the standard three. At the start, the player can only use UAV, Care Package and Predator Missile, with the option to unlock one new killstreak at each of the following levels: 10, 15, 23, 35, 47, 51, 55, 59, 63, 66, 68, and 69 (all killstreak rewards will be unlocked at lvl 69). When a killstreak of 8 or more is activated, a message will notify all players in the match, showing the callsign and the streak being used (except in Hardcore or when the killstreak is a Stealth Bomber being deployed by the opposing team). It is worth noting that two killstreaks that share the same killstreak amount cannot be used together, one must be picked over the other. For example, for the 7 kills slot the player can use either the Harrier Strike or the Attack Helicopter, but not both.

In non-Hardcore game modes, the calling of a killstreak of 8 or more (Emergency Airdrop and up) will be announced with the player's callsign in the top-right corner, with the name of the killstreak directly below it (except for the Stealth Bomber, which is not announced to the enemy team). Also, even though a Tactical Nuke is announced to both teams, the player's callsign on the top-right corner will only be shown to players on that player's team.

For controllable killstreaks (Predator Missile, Chopper Gunner and AC130), if the player is killed while operating the killstreak, the player can continue using the killstreak until it is done and then respawn or enter spectator mode as normal. The only exception to this is Search and Destroy. This outcome has been protested by some who feel the killstreak should end if the player dies.