First Perk Slot / Tier One
Lightweight
Lightweight allows you to sprint faster than the default. I’m not sure whether it will be as fast as the MW2 version, but its inclusion has been confirmed.Lightweight Pro: Lightweight Pro, like the MW2 version, will allow you to aim much quicker after sprinting.
Scavenger
Scavenger is back in Black Ops and allows you to resupply from dead bodies. I’m not exactly sure whether it allows you to refill your noobtubes. I’m hoping that it doesn’t.Scavenger Pro: Scavenger Pro also acts like the MW2 version. It will provide you with extra magazines for your weapon.
Ghost
I’m guessing that Ghost will act like Cold Blooded in MW2. You will be undetectable by the Spy Plane and the Blackbird.Ghost Pro: Ghost Pro will act like Cold Blooded Pro. Your red name won’t appear above your head and enemy crosshairs won’t widen when placed over you.
Hardline
Hardline is back in Black Ops and it allows you to get your killstreaks one kill earlier.Hardline Pro: Hardline Pro, unlike MW2, will allow you to get a second chance on the results of care packages. This means that if you get something you don’t like, you can swap it for another package.
Flak Jacket
Flak Jacket is a new perk in Black Ops. It kind of works like the Blast shield equipment in MW2 in the way that it decreases the amount of damage taken from enemy explosives.Flak Jacket Pro: Resets the fuses of grenades when you toss them back and also gives you an extra bit of added resistance to enemy explosives.
Second Perk Slot / Tier Two
Hardened
Hardened in Black Ops will act much like the FMJ attachments for guns in MW2. Hardened will allow deeper bullet penetration through walls.Hardened Pro: Hardened Pro will give your bullets an extra damage count against aircrafts and turrets. It also reduces the amount of recoil you witness after being shot.
Scout
Scout acts much like the Steady Aim Pro perk in MW2. In Black Ops, Scout allows you to hold your breath for longer periods when scoping through a sniper rifle.Scout Pro: This reduces weapon sway while aiming through a sniper scope.
Sleight of Hand
Sleight of Hand makes a reappearance in Black Ops. It will allow you to reload your weapon faster.Sleight of Hand Pro: The Pro version of Sleight of Hand will allow you to aim down the sights of your weapon. However, it has been announced that Sleight of Hand Pro will not work with Sniper Rifles. This is because Treyarch wanted to make quickscoping more difficult to do in Black Ops.
Warlord
Warlord is the new name for Bling. It will allow you to have two attachments for a primary weapon.Warlord Pro: Like Bling Pro, Warlord Pro will give you the ability to have two attachments on a secondary weapon.
Third Perk Slot / Tier Three
Marathon
Marathon makes a reappearance in Black Ops. It will allow you to sprint for longer distances. However, it will not act like Marathon in MW2, which allows you to sprint without having to stop and take a breather. This will work like Extreme Conditioning in Call of Duty 4.Marathon Pro: Marathon Pro in Black Ops will prevent you from taking any fall damage. If you remember, this is what the Commando Pro perk in MW2 did. Marathon Pro in MW2 used to allow you to climb over objects faster.
Ninja
Ninja works like Ninja Pro in MW2. It will allow you to move silently by decreasing the sound of your footsteps. In MW2, the regular Ninja perk made you invisible to Heartbeat Sensors. As far as I’m aware, there will be no Heartbeat Sensors in Black Ops.Ninja Pro: Ninja Pro in Black Ops will allow you to pass by motion detectors and camera spikes undetected.
Second Chance
In Black Ops, Second Chance allows you to pull out a pistol before dying. This works like Last Stand in MW2.Second Chance Pro: The Pro version of Second Chance will work like Last Stand Pro in MW2. Instead of just being allowed to use your pistol, it will give you the ability to use your equipment before dying.
Hacker
The standard version of Hacker in Black Ops will act much like Sitrep in MW2. It will allow you to detect enemy equipment such as claymores and frag grenades.Hacker Pro: Hacker Pro in Black Ops is a perk that everybody seems pretty excited about. Hacker Pro will allow you to booby trap enemy care packages. This means that the enemy care package might exploded in their face when they try to retrieve it. Another exciting feature of Hacker Pro is that it will give you the ability to turn enemy killstreaks and equipments friendly. In one video, a player using Hacker Pro runs up to an enemy sentry gun and “hacks it”, turning the sentry gun against the enemy.
Tactical Mask
This perk will reduce the effect of Flash grenades and other concussion grenades (Stun Grenades etc).Tactical Mask Pro: This will give the player Night vision goggles.
Perks that Call of Duty Black Ops won’t have (Hooray!)
Stopping Power
For some reason, Treyarch have decided that Stopping Power will not be carried over into Black Ops. This means that the popular perk for that slot could become Lightweight, Ghost or Marathon.Commando
Yes, Commando is gone…. and good riddance too. No more knife monkeys transporting across the map because they can’t use a gun properly. Treyarch listened to the community and decided to get rid of the perk.One Man Army
After all of the One Man Army noobtube problems that plagued MW2, Treyarch have decided that OMA will not make a reappearance in Black Ops.Danger Close
Danger Close was also a major pain. Some players would equip it and then spend the entire game noobtubing and running around the map with their RPG ready and primed to go. For this reason, Danger Close will NOT be in Call of Duty Black Ops.Source: http://novascone.com
