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Big Goodbye Finish the game

Big Wall Go beyond the wall

Surprise Attack Use a tunnel for first time

The Tenth Step Reach career level 10
10/10

Guardian Angel As a medic, drag a wounded ally 20 metres in one attempt

Caved In Destroy or dismantle an enemy tunnel

Let Loose Win back to back matches

Welcome to 'Nam Kill your first enemy
1/1

Liberation Win as the NVA

Unlock your potential Complete the "Getting Started" tutorial

Big Tunnel Enter a big tunnel

Big Ride Ride the train

Big Climb Reach the highest point

Big Help Wear something on your hip

Big Sit Ride the chairlift

Big View Visit the map

Big Pack Wear a backpack

The Full Account Recover 13 logbooks from the continent
13/13

Just in Time Interrupt a Y'm-bhi just as it is about to grab an ally

Big Walk Cross the drawbridge

Mined Games In Buried, be their pawn.

Quiet on the Set In Call of the Dead, cut the lights on the Director.

Stand-in In Call of the Dead, send the crew to Paradise in solo or co-op.

Ensemble Cast In Call of the Dead, send the crew to Paradise in co-op.

Pages Best Left Blank Unlock 7 pages of the Creature Codex
7/7

Patron of the Arts Find 2 additional songs for the Lute Player
2/2

Mazed and Confused In Buried, survive an entire round within the maze on round 20 or higher.

Death From Below In Buried, drop the beat on 10 zombies in one game.

Eaten by a Grue Play Zork on the terminal.

Insert Coin Access the terminal and battle the forces of the Cosmic Silverback in Dead Ops Arcade.

Like Moths to a Flame Lure 5 creatures simultaneously using a single jar of Black Ichor

Relics of Blasphemy Bring back 5 new occult tools or artifacts for the galleon's shop
5/5

The eagle has landers In Ascension, escape on all 3 lunar landers.

Blinded By the Fright In Shangri-La, kill a Shrieker zombie while blinded by it.

Zomb Disposal In Shangri-La, dispose of a Napalm zombie without it harming any players.

Monkey See, Monkey Don't In Shangri-La, get something from the monkeys.

Sally Likes Blood Demonstrate killer economic sensibilities by taking down 3 enemies with a single bullet.

Just ask me nicely Break free from the torture chair.

Little Lost Girl In Origins, release Samantha.

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

Master Wizard In Origins, wield all of the ultimate staffs in one game.

Playing with Power In Origins, build all elemental staffs in one game.

Awaken the Gazebo In Buried, Pack-a-Punch a weapon during round 1 with no one using the bank or Weapon Locker.

A Burst of Flavor In Mob of the Dead, kill 10 zombies at once with a new beverage.

Trapped in Time In Mob of the Dead, use and upgrade all traps before round 10.

Records of the Lost Recover 7 logbooks from the continent
7/7

A Legendary Commission Successfully complete a legendary mission

Proven in the Field Reach Rank 10

A Fateful Commission Successfully complete an advanced mission

Seven Willing Souls Unlock 7 playable characters