ZeFrozenPig

He Must have a Reason Stand up for someone even though you haven't met him

The Next Most Logical Course of Action Start a group dance party

Back to School Play any Popit Puzzle whilst wearing a Newton costume

Look, I made this! Create a ship and share it

Super Cop Complete all single-player episodes on Veteran difficulty

Elderslayer Slay 50 elder dragons.

Double the Action Complete Campaign Mode In Co-Op Mode

Knot Too Difficult Clear up a tangled situation in one attempt

Throwing Flak Kill 3 Talons with a single mid-air grenade detonation.

You Know Nothing Kill Kotch before his speech ends.

Infiltration Clear the "Classified Intel Acquisition" Side Op while riding in the back of a truck

MOD Tinkerer Have every Gear MOD active for at least 1 minute each.

Ghostly Finish an entire mission without being spotted

Trepaning For Fun and Profit Collect all the items (skulls) on "Nightmare"

Empire in Chaos Complete the game in high chaos

Skilled Complete A Mission Without Receiving Any Damage

Groundbreaking Use every interactable and win in a multiplayer match

Free Bird Destroy 25 or more of Newton's robots

Cave Cleaner Veteran Kill over 500 enemies

Cryptographer Break the code.

New Shadow In 'The Savior', complete the mission without being spotted

Faithful to the Abbey Side with the Overseers in the Dust District

Reminiscence Recreate all scenes in the "Déjà-Vu" Extra Op

Charted! - Brutal Finish the Game on Brutal Without Changing the Difficulty

Clockwork Collector Obtain numbered plates for 3 Clockwork Soldiers

The Empress Finish the game with Emily Kaldwin

Flawless Execution Complete all rescue missions with zero errors

Not even a dent Complete a level with a custom made ship, without dying

Trash Picker Scavenge 40 items in a single game in Regular or Hardcore difficulty.

Bow of Artemis Acquire the Bow of Artemis

Ice To See You Defeat 'Frost Grubber'

High Flier Gain your first PERFECT medal

Accomplished Clear all missions (including Side Ops and Extra Ops)

"Eh, eh-eh. Eh eh, eh-eh!" Make someone strut their stuff

Place of Three Deaths Kill Paolo three times

Arkham City Lockdown Defeat every Villain With Batman

Gatherer Find 50% of the collectibles in the campaign

Parasite-Seeing In Shadows of Evil, kill 5 Parasites while riding on the train.

Heart Whispers Using the Heart, listen to the secrets of 40 different people

Powered by Steam Collect all the items (Steam Cells) on Airship

Flooded Basement Drain the water to recover a Rune

Location Scout Visit all Locations in Director Mode.

Acrobat Eliminate 10 enemies with Drop Assassination

Depth Clear the "Eliminate the Renegade Threat" Side Op by extracting both targets

Dinner at 8 Guide 8 Sacklings to the very end

Throttled Escape Escape using a relic in Regular or Hardcore difficulty.

Completionist Complete all Extinction challenges and escape in Regular or Hardcore difficulty.

All the Gears Earn 5 Gears in every Challenge.

Outsmarted In singleplayer, get a quadruple kill with a single Frag Grenade

Rolling Heavy Kill 5 enemies using one burst of Unstoppable Force.