BowserGTR

Marksman - Heavy Arms Kill 150 enemies with any heavy weapon. (campaign only)

Get that Kid to a Psychologist Find all the snowmen vignettes in the North Pole.

End of your rope Cut a grappling hook rope with enemy on it.

Walk in the Park Complete Mission 3 (Any Difficulty Level)

Teamwork! Completed 3 missions with another player.

Grind 'em All! Kill 5 Bolterflies in a row with the Pepper Grinder

Racer Rank 10 Reach Racer Rank 10

Predator Gold Achieve 24 medals on predator challenges

Freeflow Perfection Perform a perfect combo including all of Batman's combat moves (any play mode)

Ultimate Hot Potato Get 100 kills with the Grenade Launcher.

It Has Begun Complete 1 S.T.A.R. Lab Mission

People Person Play with 10 different co-op partners for at least 15 minutes each.

Hello Little Friend Get 250 kills with the Minigun.

The Samaritan Complete all space missions.

Marksman - Shotgun Kill 75 enemies with any shotgun. (campaign only)

Unfriendly Fire Save a bullet.

Depot Demolition Destroyed Lance Depot

Real Rebel Unlocked all the Rebel skills.

OMGWTFBBQ Get 100 kills with the Flamethrower.

Grenadier Score "excellent" in the grenade range in "Atlas."

Spice of Life Played each type of side mission.

Sitting Ducks Kill 3 enemies with one shot of the Sniper Drone in "Manhunt."

Adapt and Overcome Blow up 10 explosive objects, killing at least one enemy each time. (campaign only)

Fearless Skydived 10 times.

Knoxx-Trap Killed General Knoxx-trap

Never Saw it Coming Boost jump, dash forward, then air stomp on an enemy.

10 Heat Reach Heat 10

Steele-Trap Killed Commandant Steele-trap

Ned-Trap Killed Dr. Ned-trap

The Helghast Complete level 'The Helghast'

We Were Soldiers Complete game on "Combat Op" difficulty.

Muerte la robo-lución Killed the Interplanetary Ninja Assassin Claptrap

A World Without Christmas Complete the holiday text adventure.

Upgrade Master Upgrade all Cop Pursuit Tech in one car to maximum level and equip both slots

Keep Digging, Detective Complete any case file in single-player

Multiplier Hit a X 10 Multiplier

Maxed Out Upgrade all weapons and equipment

Light my fire Set 10 zombies on fire simultaneously.

A Farewell To Arms You are relieved.

Pressure Applied Complete Ep. 1: Back to School

Oh, no you don't Kill a Ram using tackle skill.

Overachiever Get 3 stars on 1 S.T.A.R. Lab Mission

Multiplier 10x Score a 10x multiplier in a Story level

One Hundred And Eighty You scored 180 with 3 darts.

My Blaster Runs Really, Really Hot Score 10,000 points on My Blaster Runs Hot.

Q-Force Champion Complete the game on Hard.

By the Book Do a Non-Lethal takedown on 10 criminals in single-player

There and back again Explore the entire island.

It'll Cost Ya You made a taxi trip from one island to another without skipping.

Monster Masher Kill 20 monsters in Story levels