Well, basically hardline pro is one of Tier 1's perks and it is unlocked when
In general getting 7 killstreaks in one match is fairly easy. you can die after every two to get 7 RC cars or uav's or if you want a challenge you can get all 3 of your chosen killstreaks about 2 times and then get a 2-kill streak to top it off.
it makes kill streaks 2 kills less
If you mean like a care package then it requires Hardline Pro.
This allows you to change a care package once per package.
You get to change your care package. For example if you get amo, you can change it to a spy plane
Highlight the perk, press square (or whatever button for your console) and read about the challenges required.
get hardline pro get a care package double tap square or X to change it
you cant force car packages to be better but you can use hardline pro to ''reroll'' the package, changing its contents
Set your kill streaks to care package then get 5 kills (4, if you are using Hardline) then hopefully you will get a death machine. If you got Hardline Pro you got two attempts to get it. I got 3 death machines in one combat training match while using Hardline Pro.
You cant. When you get kills, that will add to your kill streak. Unless you have hardline pro (black ops), Which decreases the number by one.
It is a Perk used to gain a killstreak with one less kill. Very use full if you choke under pressure to get your killstreak. Hardline Pro gives access to change the care package drop to another random thing.
To get the rc-car in black ops wii you have to get a three kill streak. if you have hardline you can get it in two kills.
Absolutely, it is the reward for a 3 kill-streak, or 2 with hardline on.