R8drifter

Stowaway In Voyage of Despair, spend 5 consecutive rounds in the Cargo Hold

Postmaster Complete any outpost by activating all of the generators in Regular or Hardcore difficulty.

I've Got This Acquire all upgrades

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

Lights Out Complete the "Light 'Em Up" Special Ops mission on Veteran difficulty.

The Bomb Bag Kill Satan with Cain

I Call Shotgun! Drive a vehicle with a Sentry Gun on the back and have it kill 5 enemies

Silent Sniper Complete The Last Yardbird as Silent Assassin.

Island and Chill Complete The Last Resort.

Justice Is Blind Kill 4 enemies who are stunned by a Flashbang Grenade in any Operation.

West Side for Life In Blood of the Dead, reach Round 20 without leaving the West Side of the island

Helpful Stranger Revive a player from a different Squad in MWZ

Big Game Trapper Use a hypno trap to turn a Rhino friendly in Mayday in Regular or Hardcore difficulty.

Give Them Something to Believe Complete New Game Plus

Acquire Waffle Weapons! Obtain the Ray Gun, DG-2, and the Monkey Bomb at the same time in a game. (Map Pack 3 only)

Undiscovered Truths Find all the intel hidden in Nightfall.

Deliver This Complete the "Special Delivery" Special Ops mission on Veteran difficulty.

Chimp on the Barbie In Ascension, kill a space monkey with a fire trap.

Tag, You're it! Use the Spotter Scope to tag 60 enemies or items in Open Combat Missions

I Know a Shortcut In Voyage of Despair, take every fast travel path in a single game

Acidic Alchemy In IX, Get a kill with the Acid Trap in each of its craftable locations

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

The Guillotine Kill Isaac with Judas

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

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

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

Golden God You are the best!

The First One is the Hardest Get your first 1,000,000+ combo

Judas' Tongue Kill Satan with Judas

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

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

The Coin Bag Kill Isaac with Cain

A Little Pack Here, a Little Punch There In Voyage of Despair, use the Pack-a-Punch at every possible location in a single game

High Score In Zombie Rush, obtain a Personal Score of 250,000

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

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

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

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

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

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

You Can Pet The Dog Pet a Hellhound in MWZ

Troglodyte Kill all scientists with head shots in ‘Self Destructive’ Operation.

The Ultimate Sacrifice In Zetsubou No Shima, retrieve the Skull of Nan Sapwe.

Blood Rights Kill Satan with Samson

It's a Trap! Kill at least one zombie with three different traps in a single round. (Map Pack 2 only)

Multiplicitous In Zombie Rush, get your score multiplier up to 100

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

Burning times Complete a level on Master difficulty without using bombs, overdrive or boost with a custom ship

Grounded Kill an airborne enemy with Brigitte's Whip Shot in Quick or Competitive Play.