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Inferno Complete the mission "Inferno".

Two Birds With One Stone Hit two enemies with the same weapon in one throw

Shock Therapy Impale an enemy with the Javelin Gun and use its Alt-Fire to shock 3 others (single player only)

Hoist the Flag In Multiplayer, capture 10 flags in Frontlines

Disco Create a sun ray with Kotal Kahn and perform a flip stance 5 times while in the ray

It's a Trap! Kill 20 enemies with Detonator Mines in a deployed state

BUDDY!!! Send a Tower Challenge to a friend

Zoo Keeper Collect all the masks

Friends in low Places Dislodging derelict in the depths

Batman Clear Chapter 2 using Nigel the Bat

Close Encounter Kill 10 alien Necromorphs.

Think Fast Kill 30 Necromorphs with Kinesis objects

Cabin Fever Make it to the cabin in Regular or Hardcore difficulty.

Room for Reflection Hanging up

Field Research Unearthing secrets

Wee wee wee They never made it to market

Pack Mentality Pull together

Veteran Complete the War Stories Under No Flag, Nordlys & Tirailleur on Hard

Guns For Show Use all guns at least once

Unfathomable Take a deep breath

Bronze Revenge Obtain 24 medals on the original Arkham City ranked maps (as Batman)

Legion Arm Collector Collect all Legion Arms.

My Boom Stick Kill 6 enemies at once with Line Gun's Alt-Fire (single player only)

Pitcher Use all throwing weapons at least once

“A Shocking Turn of Events” - Rescuer Rescued the Little Sister in “A Shocking Turn of Events”

“The ‘I’ in Team” – Collector Found all collectable Roses in “The ‘I’ in Team”

A Tableau Skipping stones at the beach

No Assistance Required Complete a Special Ops Mission Mode game on Hardened or Veteran with no player getting downed.

Get Your Hands Dirty Complete 'Semper Fi' on Veteran difficulty. (Solo only)

YOLO Deceptively Beat the Last Chapter Without Dying on Normal Difficulty or Harder

Knife Beats Chainsaw His engine roars, but my knife is strong enough to take him out. (Ch.3)

RIG Master Fully upgrade your RIG.

Plain Luck Hit three or more enemies with the same weapon in one throw

One Man Army Kill 400 enemies.

Office Space Do an elevator pitch

The Story of the Refined Old Lady Find out about the last story of Antonia.

Get Rich or Die Trying Have $50,000 current balance in a Special Ops Survival game.

Sounds Of Animals Fighting Wear all masks at least once

Clockwork Shadows at noon

Pianist of Krat Play a perfect tune on the piano at Hotel Krat.

Sins of the Fathers Complete the War Stories Under No Flag, Nordlys & Tirailleur on Hardcore

Invitation to Die For Completed Chapter 1 of Episode 6

The Last One It comes together

The First Puppet Kill the Nameless Puppet.

Mr. Sandman Completed Chapter 2 of Episode 6

I Don't Have Time for This! It won't stay dead! Better only fight when I have to. (Ch. 7)

Killer Instincts Completed Chapter 3 of Episode 6

From the Ashes Completed Chapter 5 of Episode 6

The Science of Deduction Completed Chapter 4 of Episode 6

Elementary, My Dear Jesse. Completed Chapter 6 of Episode 6