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Greatest Tag-Team in History Defeat both Lightning Skeleton arenas in The Great Temple on Hard Mode, with 2 or more players (or as Javier Jaguar)

The Pinball Effect Complete "The Pinball Effect" challenge

TRIPLE WHAMMY Jump on a GI Pup's head, then punch the helmet so that it takes out at least three enemies in a row.

Silence is Golden You completed The Brigmore Witches without alerting anyone

A Real Weapon Upgrade your melee weapon again!

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

Perk-a-Holic Have all four perks simultaneously active in a game of Nazi Zombies. (Map Pack 2 only)

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

Feel the Magic Use Amy's All-Star Move to send Sonic dizzy with love!

Puzzle Master Completed the game on the hard puzzle difficulty setting, any ending.

Strangelove's Thoughts Read all of Strangelove's memoirs.

Chemophobia Defeat the trademarked chemical.

Missing Persons Complete Hyperion Base.

RPM Completionist Gain all stars in 'RPM'.

Carbon Collector Collect 100 Carbon

Under pressure Finish Randall's nightmare

Eating Your Cake Too Finish a 10th run

Elements Completionist Gain all stars in 'Elements'.

Mixed Messages Take a picture with elements of horror, brutality, outtake and erotica in a single shot.

9600 BC Completed! Complete the Ancient Atlantis time zone

Keeping Calm Don't kill anyone in Level 2: The Solitary Killer

Extraordinary Popular Delusions Had all happiness values above 50

Year 673 Completed! Complete the Medieval time zone

40 Knives! Kill 40 zombies with the bowie knife. (Map Pack 3 only)

Ultra, Man! If yer gonna fight, give it your all, pal. Performing 100 Ultra Combos oughta do it, eh?

Day 0 Completed "Day 0"

Through The Mist Acquire the gas mask.

Z-Genocider 2: Genocide Harder Kill 53,596 zombies

Out of the Bush Complete "Out of the Bush" challenge

Headshot Bonanza Complete "Headshot Bonanza" challenge

Did you see that? Destroy 5 helicopters. (Campaign)

The architect Finish Mission 5

Doublecrossed Eliminate GRIFTER.

Clock Work Set a Personal Best Time on every Time Trial course.

Sniper Master Deliver 100 headshots.

Perkaholics Anonymous! Survive until round 20 without buying a single Perk. (Map Pack 3 only)

Laser Eye Surgery Kill the eye cube while pulling back the arrow

High Noon Kill at least 3 enemies between 12.00-12.05 local time.

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

Frequent Flyer! Use the teleporter 8 times. (Map Pack 3 only)

Through the Crypts Complete Level 3: The Way to Rivendon

Technological Terror Destroy a "harvester."

Collector Acquire all items available in normal time attack

Where is everyone? Find a member of your crew

GD Parkour Instructor Complete all Parkour Fever Challenges at night

Together Till the End Be the last man standing

Factory Zero You survived Hei Zhen Zhu and RBS using no Praxis kits, weapons, grenades or mines. Whoa.

Turbocharged Completionist Gain all the stars in 'Turbocharged'.

R2-D20 20 Destruction streak

I've not seen such bravery! Complete all Trophies in Gauntlet™