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Stronger, Faster, Probably Poisonous Recklessly and irresponsibly eat every Orange Goo on AR-Y 26.

Lore Master Get 100 % of the Observables from all Missions in Story Mode.

You're Hopeless Fail to save Wilty

BFF! Make a best friend.

Formidable Encounter Defeated the Guardian of Nahn.

Woo Hoo! Make Woo Hoo.

The Ultimate Skydive! Skydive uninterrupted from the highest point possible to the lowest point possible!

Docking the Night Away Complete 2000 Docks on Normal.

We Have Liftoff Complete 2035 Spaceways on Normal.

Imposing arsenal Open and buy final versions of all weapons

Fertilizer Man Kill 200 zombies in a single game. (Map Pack 2 only)

Duet Play an instrument next to another player, who's playing a different instrument

Zoologist Scan all the creatures on AR-Y 26!

Mind if I Borrow This? Pull a Bolt From a Walker Then Kill Them With It

dr0n3d Complete the "Arctic Recon" Special Ops mission in under 3:30.

Burn 'Em Out Kill 1000 enemies with fire.
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Dressed For The Weather Construct a cold suit.

Extinguisher In the Sewer map, kill 5 enemies in 1 wave by setting them on fire then extinguishing them

Yule Be Back! Played through Endless Christmas

Pervert Hang around the room with Quagmire in a baby costume for 30 seconds

Chill Out Defeat 5 mobs with a single Ice Wand attack.

Swimming with the Fishes In Voyage of Despair, kill 50 zombies that are underwater in a single game

IEDead Kill 60 enemies with grenades/explosives

High Roller Complete the "Iron Clad" Special Ops mission on Veteran difficulty.

Wrapped Up Complete "Thermal"

...and read all over! Find all Diaries near the Pyramid

Crash Course in Brain Surgery Kill 100 Walkers while Grappling

Specter Officer Reach max level with one class in the Cooperative campaign.

Ravenous Stud Collector Collect 60,000+ studs in a single streak (no more than a 2 second gap between each stud collected)

Don't Ever Drink And Drive! Justifiably arrest 40 people for driving under the influence over multiple shifts in a single career.

A Reservist Manually deploy Troops in 5 different Campaigns.

Hoarder Have a total of at least 250,000 points in Echoes Mode's total high score

Comeback King Won after coming back from 3 goals down

Final Twist Pulled off a win by scoring in stoppage time

Pandamonium Complete the Panda Plateau secret mission.

Duel Master Win 20 Duel PvP matches.

Moving to the 'Burbs Complete the Third Act

Big Brawler Get 10 consecutive zombie melee kills before Insta-Kill expires. (Map Pack 2 only)

Platinum Obtain all trophies

Rank - Adventurer Builder! Collect 50 Gold Bricks

Relieved of Command Kill the general commanding the Moscow defenses

Pea Shooter Kill a Rhino with only a pistol in Nightfall in Regular or Hardcore difficulty.

Next Step: Bullet Belt Fire 300 Bullets

Go for Gold! In Onslaught, acquire seven gold chalices

You Never Forget Your First Have a first kiss.

Tick Tock Climb the Clock Tower in 40 seconds in "Dark"

Seal the Deal Complete a Triumph Seal.

Get Out of Dodge Complete the Final Marked Destination on the Map

Dark, Dank and Dangerous Find a Dungeon

Atomic Obliteration - Complete all the Challenges