RGMD

None more hard Complete the Campaign on Nightmare difficulty.

Two's Company, Four's a Party Complete any Adventure level with 4 players.

Come On And ... Slam 10 zombies at once in Outbreak.

Chuck Greene: Cross-dresser? Change into all pieces of clothing in the game

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

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

Monster Master Maximize the research level for almost all large monsters.

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

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

Hot Pants Complete I Now Know Why You Cry

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

Feel the Beat, Y'all! Complete "Feel the Beat, Y'all!" challenge

The third faction Rescue all the Buddies from their respective predicaments

Act 1 Cleaner Complete all Act 1 maps on Nightmare difficulty.

Ladies Night Beat an Echo Six Expansion Pack mission with the 3 female characters in your party.

Can you dig it? Complete "Can you dig it?" challenge

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

It's time for your medicine Kill all the Residents with an Overdose Syringe

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

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

Oh Yeah!!! Complete Nothing is as it Seems

Mr. Death Get all Trophies.

The River Complete "The River" challenge

Nemesis Complete "Nemesis" challenge

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

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

Let the Dog Out Complete "Let the Dog Out" challenge

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

Came back haunted Earn all other trophies

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

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

Phantom of the Opera Kill 4 players with one Chandelier

Old School Play a 2,3,4 player split screen local game

That Party was Ace Ace every Adventure level in The Journey Home.

Head Trauma Use every type of melee weapon on a zombie

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

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

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

Ultimate Collector Find all treasure.

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

Heavy Ordinance Specialist Destroy 50 Aerial Scorestreaks with Launchers in Multiplayer

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

Man Locked Up Complete "Man Locked Up" challenge

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

Act 2 Cleaner Complete all Act 2 maps on Nightmare difficulty.

All Trophies Get all trophies.

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

Chapter 7 Speedrun Complete a Speedrun of Chapter 7 below the target time.