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Gladiator school Survive 15 consecutive waves with each of the 4 characters.

Fragmerchant - Kill 5 Helghast using a single grenade Kill 5 Helghast at once using a single frag grenade

Campaign Gold Obtain all 108 medals on the original Arkham City campaigns (as Batman)

Perfect Knight - Day 2 Complete every challenge in Arkham City - Main Story, Side Missions, Upgrades, Collectables, New Game Plus and Riddler's Revenge (as Batman)

It's Him! Patsy 5 military personnel.

No Return Complete 'Ring of Steel' on Veteran difficulty. (Solo only)

Misconception Destroy 25 Infected Water Towers before they hatch.

"When It Rains, It Pours" Complete 'Eviction' on Veteran difficulty. (Solo only)

Platinum Congratulations!

Sudden But Inevitable Betrayed! By your worst enemy.

Fearless Complete 'Relentless' on Veteran difficulty. (Solo only)

Complete Blackout Campaign: destroy 22 satellite uplinks

Superior Firepower Complete Level 3 without using the dual pistols

CCTV Is Watching You Hack all of the CCTV junction boxes in London

5 Golden Things Collect 5 rare gold rewards

Supply... Unlock new weapons by hitting a Convoy

Hardened War Hero Complete the game on Hardened or Veteran difficulty. (Solo only)

30 Pieces of Silver Collect 30 precious silver rewards

Threat Elevated Destroy 25 strike teams.

Pandemic Kill 200 zombies

Queen of the Bronze Age Collect 60 common bronze rewards

The Hard Way Complete the game on Tomb Raider difficulty

Good Time in Level 1 Complete the first level while in Time Trial mode

Survival of the Fittest Survive against Rutland for more than 5 minutes

...into the fire. Save a Buddy from a mortal wound

Infiltrator Infiltrate 10 Military Bases disguised as a Commander.

The Sun Sets Complete 'Breaking Point' on Veteran difficulty. (Solo only)

Bomb Squad Defuse all bombs in 3 minutes or less

A Few New Tricks Use 5 different Quickfire gadgets in one fight as Robin in Harley Quinn's Revenge

Copper and Tin for the Win Collect all bronze rewards

Blowtorch and Corkscrew Complete 'Blowtorch and Corkscrew' on Veteran difficulty. (Solo only)

You Got the Silver Collect all silver rewards

Gold Hoarder Collect all gold rewards

Lineman Complete a Mission intercepted from a cellular tower signal

Beat ‘Em Any Which Way Beat any boss in N. Verted mode

Wrecking Yard Destroy 2,000 vehicles.

Good Time in Level 2 Complete the second level while in Time Trial mode

What Has Been, Will Be Again Defeat Dr. Neo Cortex… again.

Good Time in Level 3 Complete the third level while in Time Trial mode

Baby Steps Finish Game in Chicken Mode

For the Motherland Complete 'Heart of the Reich' on Veteran difficulty. (Solo only)

Bearing the Burden Complete 'Downfall' on Veteran difficulty. (Solo only)

Good Time in Level 4 Complete the fourth level while in Time Trial mode

Good Time in Level 6 Complete the sixth level while in Time Trial mode

Good Time in Level 7 Complete the seventh level while in Time Trial mode

Good Time in Level 5 Complete the fifth level while in Time Trial mode

Have a Good Time All the Time Complete all levels while in Time Trial mode

Cleanup Kill 15 characters with a single Whipfist attack.

You Wear It Well Unlock all the outfits

Spare Parts - Destroy all Leech Pods Destroy all Leech Pods in The Cruiser