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Party-pooper Sabotage the wedding.

Baranor the Conqueror Complete the Desolation of Mordor with a Gold Rating.

Hoarder Have a total of at least 250,000 points in Echoes Mode's total high score

Atomic Obliteration - Complete all the Challenges

Hell Razor Kill a Burnout using the helicopter that arrives in Crash Site

Supernova Get 3 Stars on 20 different Echoes

Fast Track On Mean Street, kill all the snipers on the rooftop before the DNA bomb explodes

Break the Bank Complete "Golden Handshake."

You Died Alot Get killed by Jason 100 times.

Campaign Kitty Obtain all 108 medals on the original Arkham City campaigns (as Catwoman)

Feeding Time Feed the Narwhal.

Icebreaker Equip the Icebreaker.

Silent Sniper Complete The Last Yardbird as Silent Assassin.

Island and Chill Complete The Last Resort.

I Got This In The Darkest Shore, survive the initial beach rush without using any machine gun turrets.

Under The Ice Finish the main quest in The Pale Reach.

You know you're REALLY Insane, right? Complete the entire main campaign on Authentic Plus difficulty

Double Trouble Complete The Pen and the Sword in Multiplayer.

Fresh Fish Have 5 ice blocks in your cargo.

Save the Poet Complete The Pen and the Sword in Single Player.

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

Last Blood At the end of Guns of Stygia, kill all the enemies on the walkways before the explosions do

The Most Famous Hedgehog in the World Have your photos taken in Studiopolis Zone

From The Black Depths Catch the Colossal Squid.

Falcon and the Snowman Complete Crime and Punishment in Single Player.

Two for One Complete Crime and Punishment in Multiplayer.

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

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

Up-Lifting On Monorail Factory, kill all enemies whilst riding the lift

Polar Angler Catch all known species of fish in The Pale Reach.

Frozen Favors Finish all side quests in The Pale Reach.

Under the Radar Select a Starting Location and use an Informant to smuggle an item into Milton-Fitzpatrick.

Slip and Slide Perform a twelve-meter blood slide

Cold Corruptions Catch all aberrations in The Pale Reach.

Proper Penance Crawl for 500 meters

Peak Performance Get a score above 1,000,000 points on The Last Yardbird.

Extra Luggage Select a Starting Location and use an Informant to smuggle an item onto Haven Island.

Going Up… In The Darkest Shore, unlock the Ubersprengen.

Bible Study Collect 40 documents

Thoroughly Baptized Spend 10 minutes underwater

Campaign Nightwing Obtain 114 medals on the original Arkham City and Nightwing Bundle Pack campaigns (as Nightwing)

Without a Trace Barrel through the lava, don't let anything stop you

Campaign Wonder Obtain 114 medals on the original Arkham City and Robin Bundle Pack campaigns (as Robin)

Lock, Stock, and Barrel Complete all Mission Stories in Golden Handshake.

Swallow this! Kill 10 Deadites with a headshot

No More Marching Killed all the mascots of the Popcorn Parade

Is This Real Life? Survived rebooting the network in the Project Resolve Center

No Floating Shoot all buoys in the water.

Full House Complete all Mission Stories for The Last Resort.

Bathe With A Giant Nude Alien Take a bath with Toxxo.