Fly-by-wire

Take out helicopters with remote missile 3/3.

End of your rope

Cut a grappling hook rope with enemy on it.

The Ghost Killer

Confront Rorke (Complete "The Ghost Killer" on any difficulty.)

LOKI

Commandeer the enemy space station. (Complete "Loki" on any difficulty.)

Severed Ties

Destroy the Federation's satellite array (Complete "Severed Ties" on any difficulty.)

All or Nothing

Gather the troops (Complete "All or Nothing" on any difficulty.)

Sin City

Plan your next move (Complete "Sin City" on any difficulty.)

End of the Line

Storm the factory (Complete "End of the Line" on any difficulty.)

Into The Deep

Destroy the enemy ship (Complete "Into The Deep" on any difficulty.)

Sleeping Beauty

Kill the sleeping guy in face down rappel section

Grindin'

Completing the console section on first attempt.

Carbon Faceprint

Catch Photocopier with your face

David & Goliath

Take down the LCS on the first go.

Atlas Falls

Distract the Federation Fleet. (Complete "Atlas Falls" on any difficulty.)

Cabin Fever

Make it to the cabin in Regular or Hardcore difficulty.

City Dweller

Made it to the city in Regular or Hardcore difficulty.

Safeguard

Complete round 20 in safeguard.

Clockwork

Hack the system (Complete "Clockwork" on any difficulty.)

Deep Freeze

Drop 8 vehicles into ice holes.

The Hunted

Make it out alive (Complete "The Hunted" on any difficulty.)

Birds of Prey

Capture Rorke (Complete "Birds of Prey" on any difficulty.)

Federation Day

Gather intel on Rorke. (Complete "Federation Day" on any difficulty.)

Legends Never Die

Hunt down Almagro. (Complete "Legends Never Die" on any difficulty.)

Homecoming

Defend LA. (Complete "Homecoming" on any difficulty.)

Go Ugly Early

A-10 strafe 50 enemies

Struck Down

Find Ajax. (Complete "Struck Down" on any difficulty.)

No Man's Land

Make it to San Diego. (Complete "No Man's Land" on any difficulty.)

Brave New World

Rendez-vous in Fort Santa Monica. (Complete "Brave New World" on any difficulty.)

Liberty Wall

Take down both attack helicopters.

Ghost Stories

Escape. (Complete "Ghost Stories" on any difficulty.)

Spatial Awareness

Kill your first enemy in the Call of Duty® Ghosts campaign.

Egg-stra XP!

Complete the Egg-Stra XP challenge and then destroy a hive in the Onslaught DLC package.

Pushing Ahead

Gain access to the Compound area in Nightfall in Regular or Hardcore difficulty.

Come Up For Air

Reach the top deck in Mayday in Regular or Hardcore difficulty.

The Belly of the Beast

Reach the cargo area in Mayday in Regular or Hardcore difficulty.