GameGuide

3 Kill Streak: Uav – Enemies show as a red dot on the radar for 30 seconds.
4 Kill Streak: Care Package – Random package is dropped onto the map which can be collected by anyone on your team or on the other team it will of either ammo or a killstreak increase.
4 Kill Streak: Counter Uav – Enemies UAV is blocked.
5 Kill Streak: Sentry Gun – A computer controlled gun can be placed anywhere on the map which will automatically shoot enemies on sight
5 Kill Streak: Predator Missile
6 Kill Streak: Precision Airstrike – A computer controlled precise airstrike.
7 Kill Streak: Harrier Strike
7 Kill Streak: Attack Helicopter – A helicopter comes for 60 seconds and shoots enemies.
8 Kill Streak: Emergency Airdrop – 4 Care Packages are dropped onto the map
9 Kill Streak: Pave low
9 Kill Streak: Stealth Bomber
11 Kill Streak: Chopper Gunner – A more armoured helicopter comes for 60 seconds and shoots enemies.
11 Kill Streak: AC130 – You will get to be the gunner of a AC130 ontop of the battlefield
15 Kill Streak: Emp – Disables enemies HUD for a fixed amount of time
25 Kill Streak: Tactical Nuke – A nuke demolishes everyone and your team auto wins

Did I read that right? A game ending tactical nuke…. that would suck to be on the loosing team.