Call Of Duty : Modern Warfare 2
UAV Recon is a killstreak reward in Call of Duty 4: Modern Warfare and Call of Duty: Modern Warfare 2. After achieving a 3 kill killstreak, the player will be able to call in an Unmanned Aerial Vehicle (UAV) that serves as a reconnaissance vehicle. The UAV Recon will show enemy players as red dots on the user's minimap, even when they are not firing their weapon - unless players are using either UAV Jammer or Cold-Blooded as perks. The UAV will update enemy positions every 3 seconds, and will last for 30 seconds. 10 experience points are earned for calling in a UAV Recon in Call of Duty 4. Modern Warfare 2 players receive 100 experience points for doing so. UAV Recons will not stack in CoD4; a new UAV Recon called in the middle of another Recon will not extend the current UAV Recon; instead it will cancel it out, starting a new 30 second cycle immediately after it is used. In Modern Warfare 2 however, UAVs stack - if one is called in while one is already out, it will double the UAV's scanning rate.
AV Recon makes its return in Call of Duty: Modern Warfare 2. UAV Recon is immediately unlocked when a player creates a new profile, and can be used when the player obtains three kills as in Call of Duty 4: Modern Warfare. Any hostile player with the Cold-Blooded perk will be invisible to the UAV Recon.
The UAV itself appears as a Drone in the sky and may be shot down with any weapon, including Handguns, Machine Pistols and Light Machine Guns, but not Shotguns. A UAV has 700 health, so generally, around a magazine of assault rifle ammo will take it down, and less, with Stopping Power Pro. Players are awarded 50 XP for shooting it down (500XP in Search and Destroy).
Unlike in Call of Duty 4, the UAVs are stackable. If a teammate calls in a UAV while another one is still active, enemies' locations will update on the minimap every one-and-a-half seconds instead of three. Also unlike in Call of Duty 4, a UAV will persist through the user's death in Free-for-All game modes.
If the player deploys fifty UAVs, they get a moving version of the UAV symbol (a radar dish) as an emblem. This is much easier than it sounds, especially if tried with Hardline, making it only take 2 kills per UAV, a total of one hundred kills to get the rotating symbol, or one hundred and fifty kills without it.
The UAV is usually passed up for a seemingly better killstreak reward, making it's appearance in multiplayer matches much more rare (compared to Call of Duty 4). However, when playing a team-based match, it becomes a valuable killstreak reward because it allows teammates, who opted to use another reward in it's place, to see where enemy groups are when calling in airstrikes (resulting in more efficient killstreaks). The UAV is generally more often seen used in Search and Destroy game modes, where there are less kills available, and there is much more need to find out where enemies are.