DeftonePony

Aerial Dance Defeat 5th Colossus

Power Surge Defeat Guardian of N'Erud

Heavy and Frail Collect the Crystal Heart in Chapter 6

Forever is a Long Time Coming Defeat the Final Boss

Wall of Duty Kill three Enemies with the Riot Shield in the Campaign or in Co-op.

Masked Acquire all Mask Shards

Fustercluck Off Complete all side missions and crew challenges in Krieg's Mind.
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Monster Hunter Hunt 500 large monsters.

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

Quiet and Falling Collect the Crystal Heart in Chapter 5

No More Running Complete Chapter 7 B-Side

Tenacity Purify Guardian Silva

Center of the Earth Complete Chapter 6 B-Side

Trick Arrow Skills Shoot a Lizard with a Special Arrow

A Crappy Way to Die Kill the enemy in the porta-potty.

Daredevil While affected by one Flashbang, kill two enemies in the Campaign or in Co-op.

Giant Crown Collector Obtain a gold crown for 10 or more monsters that appear from low or high rank.

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)

1UP! Get a 1UP

The Forest Defeat the Mad Alchemist.

Ye Who Enter Open the gates to Vaulthalla.

Tall Tales Listen to All of Mudtooth's Stories

Scoring master Score more than 2000 points in one jump (complete the Onboarding sequence)

Blighted One Reach level 50

Ascension Collect 2400 Essence and hear the Seer’s final words

Single Perfect Without forming a Dual Fighter, get a Perfect Bonus on a certain Challenging Stage!

Gold Standard Get five gold medals in Challenge Mode

Stage 19 Perfect Get a Perfect Bonus on the Stage 19 Challenging Stage!

Squid Soup? Accept Jefferson's Soup

Unsullied Clear a round without taking damage.

Blessed Acquire all Charms and receive Salubra’s blessing

The Undeath of Khamun Kill The Boss of the Crypts

Platinum Congratulations!

Classic Couch Memories Complete the Arcade Mode in Multiplayer.

Pink Sunrise Collect the Crystal Heart in Chapter 7

Miniature Crown Collector Obtain a miniature crown for 10 or more monsters that appear from low or high rank.

The Imposter Defeat the False Jester.

Mottainai Complete a level without shooting.

Say Goodbye Complete Chapter 8 B-Side

Stage 11 Perfect Get a Perfect Bonus on the Stage 11 Challenging Stage!

Novice Synthesist Proof of synthesizing your first ability. Did it prove useful?

Science is done by quantity Extract with at least 15 common samples.

Branded Discover your first brand.

Overcoming the Nemesis Defeat Nemesis

A Reunion with Hanzo Completed "Yokai Country."

Nessie Reach the barge without being seen in 'Wetwork'.

The Keep Defeat the Kraekan Cyclops.

Gunless Finish 'Alone' without firing a gun.

Conga Line Have a gang of 10+ forest spirits follow you

Relic Hunter Obtain 10 relics