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Four Ring Circus Enter 4 different portals without touching the ground in co-op

Grand Theft Aero Complete the Mission The Horten's Nest

Full Frontal Complete the Game On Any Difficulty

Shotgun Expert Kill 250 People using shotguns (ranked play counts).

Velocity Rising Star Unlock additional events in 'Velocity'.

Apex Contender Unlock the 'Apex' Trophy event.

Pull the Plug Remove the Power Battery without destroying any of the sentry turrets

Slippery Slope Complete the "Black Ice" Special Ops mission on any difficulty.

Asking for Trouble Taunt GLaDOS in front of a camera in each of the five co-op courses

Redline Champion Win the 'Redline' Trophy event on gold star difficulty.

Reunited with Fidolina Defeat the Mamaback and save your dear friend.

Co-Op Sniper Co-op snipe 5 enemies

On Top of The World Climb to the highest spot in the game

Soft Targets Destroy all vehicles using the UAV in Chapter 7: Golden Gate

What the Butler Saw Complete the Wayne Manor AR Challenge as Batman without using any gadgets or taking any damage.

Safer Skies Destroy all the SAM trucks in the level in Chapter 6: Overwatch

Mapper Create a map and get it validated in all game modes

Fireworks Shoot 2 enemy dynamite sticks in mid air.

Youngling Complete Jedi Temple - Apprentice difficulty

Upgraded Player Upgrade one class 3 times (Ranked Match)

Good Santa! Find a secret gift.
"You are gifted, sir!"

Halfway There Get at least 21 stars in Echoes Mode

As The World Turns Use the large globe to kill 10 enemies in the museum

All Stars Completionist Gain all stars in 'All Stars'.

Unite In Speed Contender Unlock the 'Unite In Speed' Trophy event.

Pumpkin Patch Shoot 2 enemies in the head with a single bullet

Blood Symphony Complete the Campaign on Very Hard Difficulty

Horsepower Contender Unlock the 'Horsepower' Trophy event.

Don't Blink Score within the first 5 minutes of a game in a game vs the CPU

Shotgun Diplomacy Complete the Special Ops mission "Negotiator" on any difficulty.

Pest Control Destroy all Electroflies in the Single Player Campaign

Quick rabbit! Die less than 5 seconds after a respawn.
"Ooooh! Poor thing! Want a cookie?"

Hired Gun Reach Rank 5 (Ranked Match)

Downforce Contender Unlock the 'Downforce' Trophy event.

First Response Team Get highest revives count in a ranked match

Sakura Champion Win the 'Sakura' Trophy event on gold star difficulty.

I'm Alive! Survive until Round 10 in Outbreak.

Lamborghini Contender Unlock the 'Lamborghini' Trophy event.

RPM Contender Unlock the 'RPM' Trophy event.

Iron Grip Never lose a cube in Chamber 6 of the Mass and Velocity co-op course

Where are they going so fast? Complete 'Acta Non Verba' on hard

One In a Million Hit hostile helicopter with laser designator

Hard Charger Complete the game on Hardened difficulty

Midnight Contender Unlock the 'Midnight' Trophy event.

Bounty Hunter Have a total of at least 75,000 points in Echoes Mode's total high score

One Shot, One Kill Kill 100 enemies with a sniper rifle

Apex Champion Win the 'Apex' Trophy event on gold star difficulty.

Lamborghini Icons Contender Unlock the 'Lamborghini Icons' Trophy event.

Robot Parts Defeat the training room in less than 2 minutes

Battle Hardened Play at least one full round in every Game Mode (Ranked Match)