Knock-knock

Kill 4 enemies with 4 shots during a slow-mo breach in Single Player or Special Ops.

Downed but Not Out

Kill 4 enemies in a row while downed in Special Ops.

Professional

Earn all 3 stars in at least 15 different Special Op missions.

Royale with Cheese

Defend Burger Town.

Tag 'em and bag 'em

Find Rojas in the Favelas.

The Harder They Fall

Kill 2 rappelling enemies in a row before they land on their feet in Single Player or Special Ops.

I'm the Juggernaut…

Kill a Juggernaut in Special Ops.

Blackjack

Earn 21 stars in Special Ops.

Operational Asset

Earn all 3 stars in at least 5 different Special Op missions.

Some Like it Hot

Kill 6 enemies in a row using a thermal weapon in Single Player or Special Ops.

Ten plus foot-mobiles

Kill at least 10 enemies with one Predator missile in Single Player or Special Ops.

Hotel Bravo

Earn 4 stars in Special Ops.

Gold Star

Earn 1 star in Special Ops.

It Goes to Eleven

Earn at least 1 star in 11 different Special Op missions.

Operative

Earn all 3 stars in at least 10 different Special Op missions.

No Rest For the Wary

Knife an enemy without him ever knowing you were there in Single Player or Special Ops.

Charlie On Our Six

Earn 8 stars in Special Ops.

Specialist

Earn 30 stars in Special Ops.

Cold Shoulder

Infiltrate the snowy mountain side base.

Three-some

Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.

Unnecessary Roughness

Use a riot shield to beat down an enemy in Single Player or Special Ops.

Two Birds with One Stone

Kill 2 enemies with a single bullet in Single Player or Special Ops.

Look Ma Two Hands

Kill 10 enemies in a row using akimbo weapons in Single Player or Special Ops.

Danger Close

Get hand picked for Shepherd's elite squad.

Ghost

Plant the C4 in 'Cliffhanger' without alerting or injuring anyone in the blizzard.

Back in the Saddle

Help train the local militia.