NeveCM

Practical Mayhem Deploy an active skill in a mission, and have at least one other player use the results.

This Make You All Nostalgic? Complete the Part I challenge track in No Return

Hat Trick Kill 3 aliens with a single shot from the NX-1 Disruptor in Regular or Hardcore difficulty.

Enter the Hall Reach the Carnage Hall

Blacksmith Craft 300 items at an anvil.

Sea Legs Escape from the water on the buoy stage

Quid Pro Quo Help out a fellow inmate by making a trade.

Natural Talent You finished Mystery Foe without using any active supernatural powers

Mass Exodus Complete the final Ancestor encounter in Regular or Hardcore difficulty.

Master of Inner Peace Win 5 Master of Inner Peace Matches

Dog Fight Kill a Gargoyle with the Vanguard in Awakening in Regular or Hardcore difficulty.

Top of the Heap Reach New York Mastery Level 20.

Eggstra Nemesis! Complete the Egg-Stra XP challenge and then activate a generator in the Nemesis DLC package.

Code of Conduct Complete A Criminal Past without killing anyone.

Dressed for the Occasion Blend in with the proper prisoner jumpsuit.

Biology Lesson Kill a Bloater with the pump shotgun as Bill in No Return

Match Master Win 50 Matches

Inside Job Infiltrate a KPA Stronghold and deactivate the valve without being detected.

Mecha Mayhem Do battle against the Twins, the Destroyer, and Skeletron Prime simultaneously and emerge victorious.

TBoGT: Past the Velvet Rope Score 80% or above in all missions. (The Ballad of Gay Tony)

Professor Mayhem Purchase 4 different active skills across any number of Resistance Mode characters.

Umlauts or no Umlauts Decide the Fixer's fate.

The Architect Successfully build all of the Schematics in Mayday in Regular or Hardcore difficulty.

Smooth Like Soap Find Mejia in Cell Block B without raising an alarm.

Short Wave Defeat an enemy wave in the waves game mode

Mayday Completionist Complete all Challenges and kill the Kraken in Mayday in Regular or Hardcore difficulty.

I Would Do It All Over Again Complete the story in chronological order

TBoGT: Gold Star Score 100% in all missions. (The Ballad of Gay Tony)

Null and Void Reach Haven Island Mastery Level 20.

Inquisitive Mind Find all of the Intel in Mayday.

Spelunker Find all of the Intel in Awakening.

Self Storage Get inside a shipping container on the containers stage

Gelatin World Tour Defeat every type of slime there is!

Let's see that again Use the replay system.

Burning Neodymium Breach: Eliminate a Prime Unit while the Titan.aug is active.

Now I'm Feeling A Little Motivated Breach: Win 3 Challenges.

Slayer of Worlds Defeat every boss in Terraria.

Objection! Get Mejia to confess to murdering Wilburg.

In Transit Get inside a truck on the trucks stage

The Final Chapter Find all 7 story related intel files in Exodus.

You Wish Hit an Ancestor with a Hypno Knife in Regular or Hardcore difficulty.

Recertified Complete welcome to Packmore Resort

Twice The Fun Escape Awakening using two Relics in Regular or Hardcore difficulty.

Winners Don't Use Drugs (or Biocells) Complete A Criminal Past without using the Fixer Pill or the Altered Biocell.

Not The Rippers You Are Looking For Breach: Use the Alarm_Cancel.pkg in a server.

Unstoppable Complete the final Ancestor with at least 1 relic in Regular or Hardcore difficulty.

Silent Sniper Complete The Last Yardbird as Silent Assassin.

Gogigui Kill 5 or more KPA with a single Molotov.

Bucket List Pass through the orange chute on the girders stage

Awakening Completionist Complete all Challenges and escape Awakening in Regular or Hardcore difficulty.