There are some new killstreak rewards in Call of Duty: Black Ops for PS3 and Xbox 360 when you’re playing on multiplayer. There are a few that are free, but most cost CoD points to unlock them at rank 10 and above.
Note that game ending killstreak rewards like the Tactical Nuke from CoD:MW2 have been removed entirely. The new favorite seems to be the Chopper Gunner
Three Kills:
Spy Plane – Free – Puts a destructible spy plane in the air that shows enemy locations.
RC-XD – 1200 Points – Gives you a destructible (but very hard to hit) remote controlled car strapped with explosives. Pull right trigger to explode it manually, or it will explode on its own after a set amount of time.
Four Kills:
Counter Spy Plane – 1600 Points – Puts a destructible counter spy plane in the air that disables the enemy mini-map.
SAM Turret – 1600 Points – A destructible turret you can place that will automatically shoot missiles at enemy aircraft in its line of sight.
Five Kills:
Care Package – Free – Airdrops a random special weapon, ammo crate, or killstreak bonus.
Napalm Strike – 2400 Points – Covers a selected area in napalm and burns for a short time.
Six Kills:
Mortar Team – 3200 Points – Select three spots to bomb with mortars.
Sentry Gun – 3200 Points – Airdrops a destructible Sentry Gun you can place.
Seven Kills:
Attack Helicopter – Free – Brings in a destructible AI controlled Cobra attack helicopter.
Valkyrie Rockets – 4000 Points – Air drops a launcher with two remote controlled rockets.
Eight Kills:
Blackbird – 4500 Points – Places an indestructible SR71 Blackbird in the air that shows enemies and the direction they’re moving on the mini-map.
Rolling Thunder – 4500 Points – Calls in an indestructible B-52 carpet bomb airstrike.
Nine Kills:
Chopper Gunner – 5000 Points – Control a door mounted mini-gun in a destructible Huey helicopter. Also shows red blips on the ground for enemy locations, allowing for a very high number of kills while in use.
Eleven Kills:
Attack Dogs – 6000 Points – Lets out a destructible (yet hard to hit) group of attack dogs that hunt down the enemy all across the map.
Gunship – 6000 Points – Pilot a destructible Hind attack helicopter, with rockets and machine-guns at your fingertips.