It seems that the list of Perks and Killstreaks, the special additions that make Call Off Duty Multiplayer so interesting, has leaked out to the masses before the Call of Duty XP event next month in Los Angeles.

There are multiple levels of Killstreaks from the leaked list

Assault Killstreaks

4 Kills = Care Package
5 Kills = IMS 3 or 4 placeable mines that cannot be affected by stun or flash gernades
5 Kills = Predator Missile
5 Kills = Sentry Gun
6 Kills = Precision Airstrike
7 Kills = Attack Helicopter
7 Kills = Little Bird Flock (Mini Choppers Patrol The Map)
9 Kills = Little Bird Gaurd (Big Helicopter follows you around the map and protects you)
9 Kills = Mortar Team (5 Predator Missiles go off at the same time)
10 Kills = Talcon (Mini Robot Tank)
12 Kills = AC130
12 Kills = Pavelow
15 Kills = Juggernaught Suit

Support Killstreaks

4 Kills = UAV
5 Kills = Counter UAV
5 Kills = Ballistic Duffel – Drop Juggernaught perk for the whole team, not jugg suit
5 Kills = Airdrop Trap – Drops a hacked care package
8 Kills = Sam Turret
10 Kills = Remote UAV – Target enemies with missiles
12 Kills = Advanced UAV – Blackbird
12 Kills = Remote Turret – Sentry Gun that you can control
12 Kills = Stealth Bomber
18 Kills = EMP
18 Kills = Juggernaught Recon Armour – Care Package Drop Armour
18 Kills = Escort Airdrop – Drops 5 care packages, one will be hacked

Leaked Perks (+ means Pro version)

Tier 1

Extreme Conditioning – Sprint longer distances + Climb obstacles faster
Sleight Of Hand – Reload faster + Faster weapon swapping
Scavanger – Reload ammo from bags + Spawn with more ammo
Blind Eye – Undetectable from air support + Faster launcher lock on and extra damage to air support
Recon – Explosive damage marks target on HUD + Bullet damage marks target on HUD

Tier 2

Hardline – One less kill for Killstreak + Two assists count as a kill towards next killstreak
Assassin – Immune to UAV, Motion Sensor, Thermal and Heartbeat Sensor + Immune to CUAV & EMP
Overkill – Two primary weapons + Second primary can have 2 attachments
Quckdraw – Faster aim down sights + Faster animation of using equipment and throwing grenade
Blastshield – Flack Jacket (Immune to most explosives) + Immune to stuns and flashes

Tier 3

Sitrep – Enemy equipment is visible + Enemy footsteps are more clear
Dead Silence – Your footsteps are silent + No fall damage
Stalker – Faster movement with ADS + Delay on claymores
Marksman – ID target from range + Longer hold breath on scoped weapons
Steady Aim – Increased hip fire accuracy + Faster aim down sight while sprinting.

Source FanboyFeed