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

Come On And ... Slam 10 zombies at once in Outbreak.

The third faction Rescue all the Buddies from their respective predicaments

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

A Little Pack Here, a Little Punch There In Voyage of Despair, use the Pack-a-Punch at every possible location in a single game

Special P.E.T. Benefits Acquired Special Delivery, P.E.T., and Employee Benefits.

A Chance Encounter Completed Mission 07 in campaign mode.

Extreme Manhunt Complete a Seasonal Manhunt mission on Challenge difficulty or above.

Better than the Best Complete the entire campaign on Authentic Plus difficulty with no manual saves

Donut Mess with a Cop Unlock Officer Dick.

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

Don't burn yourself out Defeated the Keeper

Follow your blade Complete the game with the path of fury

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

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

Going to the Vet Earn the "Veteran" Challenge Collection.
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High Score In Zombie Rush, obtain a Personal Score of 250,000

Tailor-made Chose a perfectly fitting armor

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

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

Clash in a mirror Kill Hiroki Demon without getting hit

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

Wish Upon A Star Complete Sofia's story

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

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

The New Fort Knox Gain 1500 gold bullion

Total Football Successfully convert a player to a new position in Career Mode.

Call me Terror-Billy! Beat the game on "Call me Terror-Billy!" difficulty or higher

Local Legend Restore the Pelican Town Community Center.

Breathing Room Kill a Viper who is strangling a squadmate

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

Alright, Alright Survive until round 10 in Infection.

Closing the Experiment Log Earn ALL of the platinum Flashback Relics

Good Listener Found 20 Portable Phonographs.
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The Ultimate Sacrifice In Zetsubou No Shima, retrieve the Skull of Nan Sapwe.

Survivor Survive until Round 25 in Outbreak.

The Barnard Award Bronze Score over 1500 points in a singleplayer game

Room to Grow Upgrade a facility

Untouchable Complete SAM'S STORY on Normal or higher difficulty without dying in Batwing encounters.

Multiplicitous In Zombie Rush, get your score multiplier up to 100

PC Load Letter Use the 3D printer 15 times in a single match in Outbreak.

Views From the Abyss STU: Complete "The Spider's Thread" mode.

Painting The Scenery Completed Mission 08 in campaign mode.

Go Figure Plant ShadowChild's figurine.

It's a Trap! Kill at least one zombie with three different traps in a single round. (Map Pack 2 only)

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

One Moment Please! Complete 1 Moment in Football Ultimate Team

Help Desk Get the Blade lobby desk clerk to help you bypass security.

Real men don't need a map Just in case you picked up a shielding map

Forgive me, sensei Kill Sanjuro Demon without getting hit