Sarnath

Crab Attack Defeat Crab Force in the Underground Mine.

Chapter 3 Speedrun Complete a Speedrun of Chapter 3 below the target time.

Undiscovered Truths Find all the intel hidden in Nightfall.

Chuck Greene: Cross-dresser? Change into all pieces of clothing in the game

FINE PLAY! (Opening Boss) Achieve all FINE PLAY! technical bonuses in the Opening Stage boss battle.

He knows what they did last era Found all eight audio notes in the Ancient Labyrinth

Boar Bather Rode a Razorfire Boar into the Sea of Black Tears and lived to tell the tale.

I kill dead people Killed 40 ghosts in the Ancient Labyrinth

Magic Socket Obtain the Magic Socket artifact.

Acquire Waffle Weapons! Obtain the Ray Gun, DG-2, and the Monkey Bomb at the same time in a game. (Map Pack 3 only)

Everything! Earn every Trophy in the game

Compulsive Hoarder Obtain at least 100 hidden treasure items.

The third faction Rescue all the Buddies from their respective predicaments

A Time of Wood and Stone Gathered the lost lore of Cadash Thaig ("Witch Hunt" downloadable content)

Feel the Beat, Y'all! Complete "Feel the Beat, Y'all!" challenge

Don't make me pull the trigger! Survive for 5 minutes in Demolition mode

Can you dig it? Complete "Can you dig it?" challenge

The River Complete "The River" challenge

Dinner Date Pigsy's Perfect 10: Collect all hidden food and pin-up girls.

Chapter 6 Speedrun Complete a Speedrun of Chapter 6 below the target time.

Egg-stra Devastation! Complete the Egg-Stra XP challenge and then destroy a hive in the Devastation DLC package.

Orb of Delusion Obtain the Orb of Delusion artifact.

Ain’t Got Time to Bleed! Finish ‘Interface’ single player level without using health packs.

Nemesis Complete "Nemesis" challenge

Street Fighter Complete all Dragon's Teeth Assignments

Let the Dog Out Complete "Let the Dog Out" challenge

Superior Completion Skillz! Finish the game!
"Congratulations! Thanks for your hard work!"

Heli Hero Save 3 Civilians simultaneously in Chopper Rescue

Head Trauma Use every type of melee weapon on a zombie

Untouchable Emissary Reach the end of the game without a game over.

Make Friends Acquire all six main characters.

Crystal Clasp Obtain the Crystal Clasp artifact.

Spidery Point Destroy the Spider Boss on Arachnophobia, without destroying any of its mini guns.

ARCHIVIST Collect all documents

A Bridge To Somewhere Extend the bridge in Awakening in Regular or Hardcore difficulty.

Deadhead Get 150 zombie headshots in a single game. (Map Pack 2 only)

Don't burn yourself out Defeated the Keeper

Nightwing Revenge Obtain 78 medals on the original Arkham City and Nightwing Bundle Pack ranked maps (as Nightwing)

Quick Fix Fix every robot within a single game of Fixin' Frenzy

Chapter 5 Speedrun Complete a Speedrun of Chapter 5 below the target time.

Sniped In career mode, compete for the same player with other teams, and win the negotiation war

Robin Revenge Obtain 78 medals on the original Arkham City and Robin Bundle Pack ranked maps (as Robin)

Tailor-made Chose a perfectly fitting armor

Medical Marvel Collect 20 medi-packs within a single game of Manic Medic

Chapter 8 Speedrun Complete a Speedrun of Chapter 8 below the target time.

Loyal Customer Purchased all upgrades in the Motor Forge

Man Locked Up Complete "Man Locked Up" challenge

Chapter 7 Speedrun Complete a Speedrun of Chapter 7 below the target time.

SuperSeries Champion Win the DC SuperSeries Championship

No Stone Unturned Find all ‘secret’ collectibles.