Your killstreak is determined by how many people you kill without dying. In Call of Duty 4 Modern Warfare, it is possible to get an unlimited killstreak if time is applicable.
There are only three killstreak rewards. They are as follows:
- 3 kills in a row (no death) - UAV Plane
- 5 kills in a row (no death) - Air-strike
- 7 kills in a row (no death) - Helicopter
Effects of killstreak rewards:
- UAV Plane - Uses a plane to identify other players on the mini-map. (Duration: 30 seconds)
- Air-Strike - Uses three jets to fly over the map in a given area and drop bombs.
- Helicopter - Uses a single Helicopter to fly around the map. This reward shoots any of the opposite team it sees from the air. (Duration: 1 minute)
