- "Call in a swarm of lethal Hunter Killer drones."
- — Scorestreak description.
Swarm is a Scorestreak in Call of Duty: Black Ops II, requiring a streak of 1900 points and being the highest Scorestreak in the game. It calls in a swarm of Hunter Killer Drones to circle the map to attack enemy players. Further, the drones continue to kill spawning players as long as there are drones still present. The drones are visible in the sky throughout the map during the duration of the scorestreak, appearing as orange lights circling the map. They function entirely like normal Hunter Killer drones, attacking any players and air support they see. The Swarm can take down any hostile scorestreak with ease, as there are many Hunter Killer Drones available to target enemy scorestreaks. The most effective way to counter a Swarm is to activate an EMP Systems, which destroys every drone and ends the scorestreak.
- The Swarm in the multiplayer reveal trailer looked very different from the final in-game Swarm. In the trailer the drones were not painted, had a different model (similar to the Chinese drones), and had a metallic look.
- Also in the multiplayer reveal trailer, the drones appear much larger and fly randomly in straight lines all over the sky before diving straight down at enemies. This was probably changed to the Hunter Killer drones that circulate the map instead because they are much smaller and can kill enemies accurately within windows, openings, etc.