RIKI-MYR

Total protonic reversal Complete Return to Hell on any difficulty.

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

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

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

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

Iron Mode Complete the game in Iron Mode.

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

Helpful Stranger Revive a player from a different Squad in MWZ

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

I came in like a Resogun Accumulate a total Wrecking combo of 1,000 in Demolition mode

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

Just Like Old Times Dispatch the professor with a shot to the groin.

None more hard Complete the Campaign on Nightmare difficulty.

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

He knows what they did last era Found all eight audio notes in the Ancient Labyrinth

Burgertown Escort Service Rescue 1 survivor in Infection.

The Hero Returns Took up the Hero's mantle in New Game+.

Hope and Despair Completed the additional mission: "Ebon Memories: Hope Within Despair."

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

I kill dead people Killed 40 ghosts in the Ancient Labyrinth

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

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

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

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

He Talked Too Much Defeat Emerson Miller

Extreme Manhunt Complete a Seasonal Manhunt mission on Challenge difficulty or above.

You're Not Worthy As My Opponent Breach: Send 3 Challenges.

Better than the Best Complete the entire campaign on Authentic Plus difficulty with no manual saves

Avenged Confronted the culprit behind the Vael family's murder. ("The Exiled Prince" downloadable content)

Memento Gave Sebastian a family heirloom. ("The Exiled Prince" downloadable content)

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

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

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

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

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

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

Alright, Alright Survive until round 10 in Infection.

Survivor Survive until Round 25 in Outbreak.

Don't burn yourself out Defeated the Keeper

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.

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

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

You Can Pet The Dog Pet a Hellhound in MWZ

Tailor-made Chose a perfectly fitting armor

Heavy Ordinance Specialist Destroy 50 Aerial Scorestreaks with Launchers in Multiplayer