neurodaemon

Shotgun Wallop! Kill a total of 200 Enemies using Rubi's Shotguns during acrobatic slow-mo.

Welcome to MY World Defeat 25 Enemies in the Living World as Uay Pek

The Chest Beat the Chest

Stroke of Luck Complete "Stroke of Luck" challenge

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

The Ultimate Sword Obtain Excalibur II.

Syngenesophobia Defeat the brothers.

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

A for effort Attain a Time Trial star rating of 35

Locked and Loaded Begin the game with each weapon.

Superluminal Beat the game in under 35 minutes

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

Movie Critic View 79 Active Time Events.

Cracker Complete "Cracker" challenge

The Mines of Moria Complete the Mines of Moria level in the single player "War of the Ring" Campaign.

Yule Be Back! Played through Endless Christmas

Miser Last 20 seconds without collecting a fruit in Arcade Mode

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

The Classics Play Marathon, Ultra and Sprint modes.
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Katagelasticism Mock the traitor.

Provocateur Collected and assembled the Battledress of the Provocateur. ("Leliana's Song" downloadable content)

Perception is Reality Obtain all trophies

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

Jumping in line Eliminate the aliens at Elizabeth's restaurant.

108 Swords of Destiny Obtain all of the blades available in the game.

Whatever It Takes Complete Chapter 5

Tropics Win the last race against Arcady.

Pandamonium Complete the Panda Plateau secret mission.

Long Board Ride the Hoverboard for a total of 10,000 meters (electro-mag cables don't count!)

But why are you hiding? Catch The Grandfather's thug to get the key of the cemetery.

Dirty Work Unlock the level 4 engineering RIG.

The Pinball Effect Complete "The Pinball Effect" challenge

Reached Chapter 16 Me 'n' Veevee are happy to have more allies! ...But wait, what happened to the kid!? That right arm doesn't look good, ya know!?　

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

Utility Man Complete all Missions intercepted from cellular tower signals

Took this thing on a test flight Complete Arcade mode with a custom made ship, at Veteran difficulty level

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

Nightmare Descent killer Finish 'Nightmare Descent' on Insane

Armed to the teeth Get all the weapons.

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

Barrel of Fun Find Knolan

Rank - Adventurer Builder! Collect 50 Gold Bricks

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

Business of Makin' Sausage Complete Chapter 6

Did anyone survive? Complete Ignition Mode.

Arachnophobe As Caddoc, conquer your fear as well as the spider god in Chapter 2

A place to rest Find the dynamite in the cemetery area.

Veteran Investigator Solved 50 cases.

Day 0 Completed "Day 0"

Extraordinary Popular Delusions Had all happiness values above 50