Alienkid

The Guillotine Kill Isaac with Judas

2-fer Using the EBR-14, kill 2 enemies with 1 bullet 5 times in 'Payload' without sounding the alarm

Elevator Out of Order Reach the roof in 'Highrise' under 45 seconds

Appease the Volcano Gods An NPC is destined to die in a trial by fire.

Golden God You are the best!

Judas' Tongue Kill Satan with Judas

Don't make me pull the trigger! Survive for 5 minutes in Demolition mode

Gravestone Kill 100 Zombies with a vehicle in a single deployment in MWZ

Thanatophobia WITHOUT using the Architect, complete the game dying 15 times or less

Favorite Clear all missions of any rank consecutively using the same gun parts.

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

Dinner Date Pigsy's Perfect 10: Collect all hidden food and pin-up girls.

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

The Coin Bag Kill Isaac with Cain

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

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

Mode master Win an online game of every mode in every difficulty at least once.

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

Mercy Kill 5 enemies while they are on fire in Chapter 3: Fire Sale

Donut Mess with a Cop Unlock Officer Dick.

Think fast! Finish trial #8 with at least 52 seconds left on the clock.

Fully Loaded Maximize all upgrades.

Street Fighter Complete all Dragon's Teeth Assignments

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

Going to the Vet Earn the "Veteran" Challenge Collection.
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Prime Directive Shatter Skeletron Prime.

Like a glove… Finish trial #6 with 3 hearts left without picking up a spell.

Alright, Alright Survive until round 10 in Infection.

ARCHIVIST Collect all documents

Head Trauma Use every type of melee weapon on a zombie

Real Estate Agent Have all possible town NPCs living in your world.

Coming In Hot On day 1 of the Watchdogs job, don't let the cops shoot and destroy the escape vehicle.

E Pluribus Unum Earn 20 team citations.

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

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

Back in the Field Acquire the Major's keycard in 'Deep Cover' within 90 seconds without being detected

Survivor Survive until Round 25 in Outbreak.

A Bridge To Somewhere Extend the bridge in Awakening in Regular or Hardcore difficulty.

One Down! Win in a Ranked Match.

State of the Badass Art Complete all Campaign levels on Ultimate Badass difficulty

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

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

Release the Kraken! Killed 20 enemies during the boat exfil in Rip Current

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

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

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

You Can Pet The Dog Pet a Hellhound in MWZ

Heavy Ordinance Specialist Destroy 50 Aerial Scorestreaks with Launchers in Multiplayer

Hard pressed Complete all levels on Hard

Black Gold Complete KOLCHAK HARBOR Region