harrier ac130 and nuke
Chopper Gunner, Predator Missle, Harrier Airstrike.
More guns. It continues the storyline from modern warfare 2. For multiplayer, there will be more perks and killstreaks and weapons. Also for multiplayer there will be more maps.
kill heaps of enemy killstreaks
You mean the Infinity Ward emblem? Complete the "Wargasm" challenge by getting all of your killstreaks within 20 seconds. Quite easy with Hardline and the lowest killstreaks.
UAV, Airstrike, Helicopter (not drivable, it just flys around the map)
Having killstreaks 7, 8, 9 and earning them all in one match.
The EMP, electromagnetic pulse, knocks out all electronics on the enemies team. Radar, laser crosshairs, and enemy killstreaks. however use when your killstreaks are gone for the EMP will take them out too. Great killstreak gotta admit.
No, the only thing you keep are your titles and emblems. You lose your guns, skins, perks, attachments and killstreaks.
The best killstreak is the Tactical Nuke but use killstreaks that you can get frequently.
so far it is unown, but i heard there wil be a helecopter version of the RC car
It's on online multiplayer and you must be level 10 to unlock this. It's under killstreaks when you have the callsign and killstreaks. You have to get 9 kills without dying or 8 if you have hard line. Then you will get a pave low which you activate by pressing the button that has pave low on it.