ProtectiveManEgg

Networking Reach a 5-heart friend level with 10 people.

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

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

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

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

Frozen Fists Complete Frosted Fjord without having a melee or ranged weapon equipped at any time.

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

I Just Called To Say I Love You Listen to the messages left on 5 different answering machines.

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

Boom Kill 50 enemies with explosives or abilities.

Mountain legend Complete 30 MOUNTAIN STORIES in Alps

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.

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

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

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

A Star is Born Earn a bronze star in Career mode

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

Pied Piper of Squirreldom Have 5 squirrels following you around at the same time

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

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

Local Legend Restore the Pelican Town Community Center.

Untouchable Emissary Reach the end of the game without a game over.

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

Faith in the Fallen Take a leap of faith

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

Repeat Customer Save yourself by using the Death Barter enchantment twice in a single mission.

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

Rising Star Earn a silver star in Career mode

Survivor Survive until Round 25 in Outbreak.

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

Act 2 Cleaner Complete all Act 2 maps on Nightmare 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.

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

Heavy Ordinance Specialist Destroy 50 Aerial Scorestreaks with Launchers in Multiplayer

Don't Stop Me Now Create a coaster at least 1500m in length

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

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

Reaper Kill 30 Sowers.

The Clockwork Tomb Complete the quest: The Clockwork Tomb

Concierge Service Provide the best Hotel Service on the most expensive property without a player going bankrupt

Rank - Expert Builder! Collect 80 Gold Bricks

Act 4 Cleaner Complete Act 4 on Nightmare difficulty

Sack the Postman Post all 6 invitations for the party.

Escaped Awakening Escape Awakening for the first time in Regular or Hardcore difficulty.

High Wire Act Kill 10 enemies while using a zipline

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