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Change of Heart Achieve a total of 100 Grind-Switches

Drop The Bald Defeat Lex Luthor.

Silver bullet Obtain a silver medal in 10 different challenges

For the Fallen Recover all 33 COG tags (on any difficulty)
17/33

Last Survivor Win a game 10 times.

Small Consolation In Shangri-La, use the 31-79 JGb215 on each type of zombie.

Unseen Strike Stealth kill a total of 10 enemies in a single mission.

Time's Running Out Completed a Hacking Level With less than 5 Seconds Left

Music for All Ears Reach rank 3 or higher in the Music for All Ears imp quest

Hugs! Kill 20 enemies in a single burst of Explosive Touch in Carrier.

Blastfighter Complete a mission with all parts of the SWAT-12 shotgun equipped.

Taster Session Try all the game modes in Single Player Race

Master Angler Catch every fish.

Headhunter As a Fireteam member, get 1000 head shots on AI enemies
0/1000

Keep on Trucking Climb onto the roof of a truck on the trucks stage

Abandon All Hope Rescue 4 survivors in a single game of Infection.

Full Shipment Ship every item.

Marksman Destroy an enemy with a shot fired from 300 meters away.

Time Attack In Gorod Krovi, complete Time Attack: Round 20.

Sellout Spent 250,000 fans - any mode

Sneaky Gardener Get through the Monaco casino gardens without being spotted

Help From My Friends Get at least a Bronze medal on 10 different co-op challenges.

Subzero Hero Obtain clothing to get a survivable temperature rating of -22°C / -7°F.

Desert Spear Assassinate Sheikh Shaheed.

Third Eye Hit 20 opponents with weapons dropped as secondary weapons

Warm-up Clear 100 levels or more.

Right of First Defusal Defuse 5 gas bombs in a single match in Carrier.

I Like to Keep This Handy Kill 2 enemies with one shot with the shotgun

FIRST MISSION Play an Objectives mission online for the first time.

The Bigger They Are… Complete Collapse and Fracture in Co-Op Campaign

Flyswatter Finished the lift battle in Chapter 2 without taking damage from Insecticons.

Web of Defeat In Zetsubou No Shima, remove webs in every possible way in one game.

Overachiever In Origins, complete all 4 Challenges in one game.

Take Off, Hoser! Ride Chompy for 5 minutes in a single match in Carrier.

Memory's Melody Collect and listen to all records from the Forgotten Time.

The Coyote Win a race in Assault Mode

Coup De Gracie Use Junker Queen’s Jagged Blade and Carnage to pull and kill an enemy in Quick or Competitive Play.

LUNATIC Finish the game in Insane mode

Win online Come first in an online event.

Easy Rhino In Dead Ops Arcade, use a Speed Boost to blast through 20 or more enemies at one time.

Level 10 Reach level 10
0/10

Pump It Up On Bomb: Forest, stop the cops from disconnecting the water hose whilst using the river water pump.

Shutout Win a game of soccer without the opposition scoring in the soccer game mode

Telefragathon Telefrag 50 enemies in a single match in Carrier.

Gotta Get Rifty Complete "Rifty Business"

Most Wanted Reach reputation level 100.

Survivalist Survive for 30 seconds on Pacifism Classic without going through a gate

Challenge Domination Get a Gold medal on all single-player challenges.

Secret Service Prevent the assassination of President Ronald Sung.

Fire Watch Have 5 Fire Stations