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Two's Company, Four's a Party Complete any Adventure level with 4 players.

Celebrated Master of Ognapology (Ognadae Tetratetron) Find four different species of Ognapod.

Thanatophobia WITHOUT using the Architect, complete the game dying 15 times or less

Flyswatter Destroy all helicopters in the "Vertigo" Special Ops mission.

Worth Every Penny Acquire 1000 credits in one month.

State of the Badass Art Complete all Campaign levels on Ultimate Badass difficulty

Closing the Experiment Log Earn ALL of the platinum Flashback Relics

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

Off My Planet Recover the Hyperwave Beacon.

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

The Ultimate Sacrifice In Zetsubou No Shima, retrieve the Skull of Nan Sapwe.

I Had No Choice! Wrong time wrong place

No More Fears Defeat your fear

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

Pinnacle Complete the "Vertigo" Special Ops mission on Veteran difficulty.

To Hell And Back Finish the game on Very Hard Mode with any character

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

Blood Donor Pass 5000 levels in Bloody Palace Mode

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

To Jugger or to Jugger-Naut Kill all juggernauts after they land on Veteran difficulty in the "Vertigo" Special Ops mission.

Man No More Build a suit of powered armor.

Escaped Awakening Escape Awakening for the first time in Regular or Hardcore difficulty.

Tycoon Complete the GFO Oil Rig mission.

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

Red Faction: Armageddon Master Unlock all Trophies in Red Faction: Armageddon

High Score Score 800,000 points in one game -- with Game Settings set to Hardcore.

Loyal Customer Purchased all upgrades in the Motor Forge

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

Burning Inside Kill another player with Crucible in a Foundry Versus Match

Boys Club Beat an Echo Six Expansion Pack mission with the 3 male characters in your party.

Starlight, Star Bright Earn every star in Team Adventure Mode Chapter 4.

Quill Tosser Killed a Tollusk using only Ground Urchins.

Shoot'em Up Get a birthday present

Egg-stra Awakening! Complete the Egg-Stra XP challenge and then scan an obelisk in the Invasion DLC package.

Wander and the Forbidden Clear the game in hard difficulty

Don't Bite Snow White Keep the Gold

State-of-the-Art. Bang, Bang! Kill 10 enemies in a row with Sniper Rifle headshots

Not a Fluke Win 10 Blackout games

Nightfall Completionist Complete all challenges and kill the Breeder in Nightfall in Regular or Hardcore difficulty.

Voices From Beyond Unlock all songs in the Mouth of Metal

Steamroller Achieve a win streak of 5 ranked online games.

Threat Neutralized Get past the security ROMs without taking a scratch

AMG Completionist Gain all stars in 'AMG'.

Turnabout is Fair Play Kill 50 Cryptids with the Venom-X weapon in Nightfall in Regular or Hardcore difficulty.

Chapter 9 Speedrun Complete a Speedrun of Chapter 9 below the target time.

Fashion Master Obtained 50 or more avatar outfit parts.

Home Alone Unlock all trophies

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

King of Bling Earn ALL of the Clear Gems

Endangered Lizards Killed all shining lizards