Arsenite

Master of the Blood Double Teamed with every Tainted Coil unit

Data Mining Acquire all data storage devices.

Mom's Knife Kill Satan with Isaac

Head Otter Wear the sea otter head.

Has science gone too far? Get a kill using the HT-95 Levkov, XD-1 Accipiter, Rorsch Mk-1, and Schipunov 42

Spliced Complete the "Wrath of the Machine" raid.

Digi-Me Start your Player Career with a Created Pro

Feline Revenge Obtain all 72 medals on the original Arkham City ranked maps (as Catwoman)

Finally Home Complete every Adventure level in The Journey Home.

The Contribution Sell 15 valuable items.
8/15

The Polaroid Beat Cathedral 5 times

I Need A Boost Make your first Mod Purchase

Trickster of the Trade Changed your vocation to trickster.

Found in the Shuffle Beat the Nero Brothers' shuffling game nine times in a row.

Beating the Ragtime Blues Correctly answer all the questions in Ragtime Mouse's pop quiz.

Mental Unblock Get a 350000 Drift Score in Mental Block with Ken's car

Siege Complete the "Light 'Em Up" Special Ops mission on any difficulty.

Firestarter Destroy all the Winter Shards and light all the fires in the Old Temple.

Coolest Thing Ever Jumped over a Hextadon in the Deuce

Not a Scratch Finish with your tank at full health in the "Iron Clad" Special Ops mission.

The Price of Knowledge Exacter Dunmire gains the knowledge he seeks.

It's All in the Cards III Win 100 Tetra Master matches. (Certain NPCs can be re-challenged to increase your win count after progressing through the game.)

Dominion Master Win 20 Dominion PvP matches.

Overkill Completed all hunting secondary missions

Full Master Earn all Gold Medals available in Mastery Challenge

Roll Call Win a run with every character in No Return
0/10

Deforestation Kill 15 Seeder Turrets in one game in Mayday in Regular or Hardcore difficulty.

A Remarkable Accomplishment Complete Story Mode at Hard difficulty.

SuperTilt! Tilt 10 times in a row

The Negative Beat Sheol 5 times

Modded Complete an encounter with each Mod in No Return
0/26

Hail to the King Jump rope 1000 times without tripping and obtain King of Jump Rope.

Play Your Way Equip a different Effect, Emote and Execution on a single Hero.

Egg-stra XP! Complete the Egg-Stra XP challenge and then destroy a hive in the Onslaught DLC package.

Well that was educational Collect all Audio Logs

Untouchable Use only one self revive care package in the "Special Delivery" Special Ops mission.

Dunk Tank Come on and slam and welcome to the Amazon.

Down With The Sickness Defeat the Unmerged Terror.

For Good And For Ill Extract Dr. Zybert.

Faithful Stomund, Captain of the Fidelis is greeted at the Empyrean.

Band of Blubbers Rescue five of your brethren from an awful fate.

Do Travelers Dream Of Electric Sheep? Power up a device with the Conductor.

The Boy Who Could Run Complete all Parkour Fever Challenges

Stomp-A-Mole Eject 10 Abas from the ground

Anything Can Be A Weapon Throw an opponent into fire or spikes 50 times.

I never doubted you! Win 10 Rounds of Infiltration

Isaac's Tears Kill Isaac with Isaac

The Secret Gardener Orange no-thumbs are the new green thumbs.

Ash the Leech Gain 10 health chunks using Heroic Gifts

dr0n3d Complete the "Arctic Recon" Special Ops mission in under 3:30.