Alienimator

Laugh It Up Partner Beat the top score on the "Mess Hall" Challenge

Jack of All Trades Play a full game with each class (ranked only).

I've Got Box of Steel Clear The Executioner without taking any damage.

All Assault Rifles collected All Assault Rifles collected and displayed in Hideout

All Heavy Weapons collected All Heavy Weapons collected and displayed in Hideout

Hoff The Charts! In Spaceland, unlock David Hasselhoff.

Never Stop Looking You escaped Rifleman Bank Station. Nothing will stop you from finding Megan now.

Vender Bender Destroyed 90 market stalls in Hot Pursuit

RC Assassin Get 5 kills in a round with the RAWR

Nemesis Kill Maddox once and for all ("No Loose Ends")

Back Home Escape the Encasement with Fai's help

Intergalactic Mechanic Collect all 5 Vessel Shards

Crystal Crusader Complete Color Combat without Dani's health falling to a critical level

Ready For Takeoff Beat the top score on the "Shuttle Bay 47" Challenge

Bridge Commander Beat the top score on the "Atrium" Challenge

Snow Storm Unlock all Zane variations

Rise of the Snakes Unlock all Snakes

Tantrum Stomp on 50 objects using mechs

Headbanger Perform 10 head shots in a row in any Operation.

To Take a Life Sphere Destroy the Life Sphere in the Blood Swamps (Ancient Gods 1)

Access all areas Unlock all Time Trial stretches

The Might of the Monkey! Use the Monkey Bomb. (Map Pack 3 only)

Herbal Remedies Beat the top score on the "East Grow Chamber" Challenge

Get A Medic Beat the top score on the "Life Support Room" Challenge

One Half of Every Married Couple Dispose of the Acari in Molten Depths while playing in a duo.

Doing Your Part Complete the Training Course in Multiplayer

Path of a Great Sorcerer Defeated 20 archfiends.

Left No Man Behind Complete the game on Casual

Fat Chance Eliminate BIG SLICK.

Need A Towel Beat the top score on the "Water Tunnels" Challenge

Enough to Build My Own Dojo! Collect 100,000,000 studs

Button Mashing Interfere with an experiment in The Marshal's Complex.

It's A Trap! Trap Jason with a bear trap 13 times.

Lamborghini Icons Champion Win the 'Lamborghini Icons' Trophy event on gold star difficulty.

Mega Star Earn 50 stars on one profile

Return to Sender Kill 5 enemies by grabbing rockets and launching them back in single player campaign

Sample Platter Use 5 different Armaments in Open Combat Missions

Unhappy Camper Kill 10 opponents in multiplayer using your sidearm

No Longer Clueless Used the Discrepancy Amplifier.

Sing the Iron Song Play the Rise of Iron theme on the bells in the Iron Temple.

First Showing Post a result online for a Challenge for your Friends to compare.

Healer Heal your partner 10 times

All Hand Guns collected All Hand Guns collected and displayed in Hideout

Locksmith! Open all doors in the map. (Map Pack 3 only)

Into the Void Take out 25 Defense Units with gadgets

D-Day On chapter I, destroy all rafts before they land.

Some Quality Time Complete all Time Trial missions on any difficulty.

All Machine Guns collected All Machine Guns collected and displayed in Hideout

Cheater! Buy a Cheat.

Mage Hunter Sided with the templars five times.