ExplosionManiac

40 Knives! Kill 40 zombies with the bowie knife. (Map Pack 3 only)

Demons on a Plane Obliterate the Infestation at the Crash

The Flying Dead Abolish the Infestation on the Mountain

The New Time-Master Beat all of Nefarious Tropy's times in Time Trial Mode.

Is everyone here? Unlock all characters from the original roster.

Rookie of the Year Earn a B Rank in the Trial of Initiation

Walk Without Rhythm Dismantle the Destroyer.

I've Got This Acquire all upgrades

Rookie Squad Complete a map in Co-Op.

An Exceptional Accomplishment Complete Story Mode at Realistic difficulty.

Doctorate in Thermodynamics Kill 2 scientists with a single grenade in ‘Self Destructive’ Operation.

Test the Product Knife 10 stacks of cocaine in ‘Hostile Takeover’ Operation.

The Warrior: Ventus Learn all of Ventus's Finish Commands.

Hearty Have 9HP at one time

Burgle Burgle Burgle Steal 10 kills from a teammate in Outbreak.

Brawl Master Win 20 Brawl PvP matches.

Campaign Kitty Obtain all 108 medals on the original Arkham City campaigns (as Catwoman)

Soul Survivor Reach round 15 in Nazi Zombies without getting revived. (Map Pack 2 only)

Frequent Flyer! Use the teleporter 8 times. (Map Pack 3 only)

Gear Five! Reach Ultimate Vault Hunter level 5.

Salute Me Achieve the rank of Lieutenant.

Give Them Something to Believe Complete New Game Plus

Darkness's Will Defeat No Heart.

Speed Slayer Kill the Breeder in less than 5 minutes in Nightfall in Regular or Hardcore difficulty.

Never Speak of This Again Finish Extermination

Sub Zero Complete the "Arctic Recon" Special Ops mission on Veteran difficulty.

All Going To Plan! Master Zangief! I fought in 50 network battles! The ring came to life with the clash of burning spirits! (Excludes Battle Lounge)

Throttled Survival Kill the Breeder while using a Relic in Nightfall in Regular or Hardcore difficulty.

Moocifer Create a Cow Demon

Sleuth Unlock all intel (videos and audio files)

Guac is Extra Find Dave the Burrito.

Survived Mayday Kill the Kraken for the first time in Mayday in Regular or Hardcore difficulty.

Taking Flight In Gorod Krovi, ride a Dragon.

Gong like the Wind In IX, defeat all 8 challengers summoned by a gong within 5 minutes

Targets Acquired Get past the first gate in Awakening in Regular or Hardcore difficulty.

Time's Teller Defeat the Unknown.

Homicidal Kill the guide, you monster.

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

Discriminating Buyer Use exactly one of each care package in the "Special Delivery" Special Ops mission.

You're On Fire! Get 5 Kill Streaks of 5 kills in Elimination or Skirmish in PvP.

Double Vision Trounce the Twins.

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

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

You know you're REALLY Insane, right? Complete the entire main campaign on Authentic Plus difficulty

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

Undiscovered Truths Find all the intel hidden in Nightfall.

Heavy Artillery Launch 25 princess attacks

Daemonologist All Charms unlocked

Fat General Defeat 500 enemies

The Sky Is Mauling! Kill 3 enemies with Mortar Strike in ‘Air Traffic Control’ Operation.