Strike Packages are rewards given for kills, Assault resets upon death but provides the player with the deadliest options as Support persists through death and is set to provide added support for your team. Specialists give the player extra perks but also resets upon death.
Assault

UAV
Shows enemies on the minimap.
Required: 3 Kills

Care Package
Airdrop a random killstreak.
Required: 4 Kills

I.M.S.
The Intelligent Munitions System detects and eliminates enemy combatants.
Required: 5 Kills

Predator Missile
Remote Control Missile.
Required: 5 Kills

Sentry Gun
Airdrop a placeable Sentry Gun.
Required: 5 Kills

Precision Airstrike
Call in a directional airstrike.
Required: 6 Kills

Attack Helicopter
Call in a support helicopter.
Required: 7 Kills

Strafe Run
Strafing Run of 5 Attack Helicopters.
Required: 9 Kills

AH-6 Overwatch
Get personal air support from an AH-6 Overwatch.
Required: 9 Kills

Reaper
Lase missile targets remotely from the Reaper UAV.
Required: 9 Kills

Assault Drone
Airdrop an Assault Drone.
Required: 10 Kills

AC-130
Be the gunner of an AC-130.
Required: 12 Kills

Pave Low
Heavily armored assault helicopter.
Required: 12 Kills

Juggernaut
Receive advanced armor via Care Package.
Required: 15 Kills

Osprey Gunner
Be the gunner of an Osprey delivering several Care Package.
Required: 17 Kills
Support

UAV
Shows enemies on the minimap.
Required: 4 Kills

Counter-UAV
Temporarily disables enemy radar.
Required: 5 Kills

Ballistic Vests
Deploy a bag of Ballistic Vests for your team.
Required: 5 Kills

Airdrop Trap
Kill enemies with a booby-trapped airdrop crate.
Required: 5 Kills

Sam Turret
Automated SAM turret that destroys aerial killstreaks.
Required: 8 Kills

Recon Drone
Control a Recon Drone, targeting enemies for your team.
Required: 10 Kills

Advanced UAV
Call in a Orbital Recon that shows the direction your enemy is facing.
Required: 12 Kills

Remote Sentry
Toss a small turret and remotely control it.
Required: 12 Kills

Stealth Bomber
Airstrike undetectable on enemy maps.
Required: 14 Kills

EMP
Temporarily disables enemy electronics.
Required: 18 Kills

Juggernaut Recon
Receive advanced armor via Care Package.
Required: 18 Kills

Escort Airdrop
An Osprey delivers and defends several Care Packages.
Required: 18 Kills

M.O.A.B.
Drop a Bomb on the entire map. Similar to the Tactical Nuke.
Required: 25 unassisted kills using only your weapon. Obtainable with any Strike Package.

Specialist
Earn extra perks through your streak. The streak and rewards reset upon death.
Pick three perks and get rewarded one after every two kills, six kills will equip all three perks.