GroundRex

Soul Survivor Reach round 15 in Nazi Zombies without getting revived. (Map Pack 2 only)

Forgotten Lore Receive all 5 cards from The Trader in P03's factory.

BADGER! Ride a Badger

I Call Shotgun! Drive a vehicle with a Sentry Gun on the back and have it kill 5 enemies

Gross! Drink water from cooler that has the lawyer head in it

Colorado Escalated Complete Level 5 of an Escalation Contract set in Colorado.

Helpful Stranger Revive a player from a different Squad in MWZ

Tag, You're it! Use the Spotter Scope to tag 60 enemies or items in Open Combat Missions

2-fer Using the EBR-14, kill 2 enemies with 1 bullet 5 times in 'Payload' without sounding the alarm

Bulldozed In Ground Control, crush 25 enemies while driving the tank

Silent Sniper Complete The Last Yardbird as Silent Assassin.

Bangkok Escalated Complete Level 5 of an Escalation Contract set in Bangkok.

Duct Tape FTW Create all combo weapons

Full House Complete a Six-player game

Island and Chill Complete The Last Resort.

Elevator Out of Order Reach the roof in 'Highrise' under 45 seconds

Behind the Curtain Complete Beckett's story

The Chosen Bun Win three games as the Hotdog Man character

Hokkaido Escalated Complete Level 5 of an Escalation Contract set in Hokkaido.

You're Not Worthy As My Opponent Breach: Send 3 Challenges.

Escape Artist Successfully extract 25 times in Hazard Zone

Research and Development Upgrade the Rarity of one common vehicle of the HOT WHEELS™ - Batman Expansion.

Chuck Greene: Cross-dresser? Change into all pieces of clothing in the game

Boar Bather Rode a Razorfire Boar into the Sea of Black Tears and lived to tell the tale.

Gravestone Kill 100 Zombies with a vehicle in a single deployment in MWZ

Back in the Field Acquire the Major's keycard in 'Deep Cover' within 90 seconds without being detected

Zombie Genocide Master Kill 72,000 zombies

Freedom Escaped the yoke of eternity.

Mercy Dealt the blow of deliverance.

The Specialist Learned all the skills of a single vocation.

Double Trouble Complete The Pen and the Sword in Multiplayer.

Dream Race Win the ultimate three-way showdown between a Ford Mark IV Race Car, a Ferrari 330 P4 Race Car and a Jaguar XJ13 Race Car.

Double Vision Trounce the Twins.

Gran Turismo Rally Complete the "Gran Turismo Rally" Special Event.

Wired Up Place 100 wires.

Closure Put an end to all things.

Save the Poet Complete The Pen and the Sword in Single Player.

Demolition Expert In a Single Player game, destroy 6 or more trees with 1 explosive

Pack Addict! Upgrade 5 weapons at the Pack A Punch Machine. (Map Pack 3 only)

Anorectic Starve for three days.

Making mountains out of molehills Kill 100,000 enemies.

You Can Pet The Dog Pet a Hellhound in MWZ

The Spider's web Defeat 50 enemies using the Amazing Charge Attack

The Stick of Truth Equip a Legendary Bo (Claws of Awaji)

Salutatorian Achieve an Overall Evaluation grade of B

Appease the Volcano Gods An NPC is destined to die in a trial by fire.

Sébastien Loeb Rally Challenge Complete the "Sébastien Loeb Rally Challenge" Special Event.

The First One is the Hardest Get your first 1,000,000+ combo

Head Trauma Use every type of melee weapon on a zombie

Prime Directive Shatter Skeletron Prime.