SniperSam

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)

Splat Success Painted with the Splatter Brush

Cold Corruptions Catch all aberrations in The Pale Reach.

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

Super-sleuth With Snowy, find all the buried objects in "Tintin and Haddock" mode!

Eh...what's up, doc? In cooperative mode, revive wounded players 5 times.

Heavy Fire Kill a total of 30 enemies with Browning gun.

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

Street Fighter Complete all Dragon's Teeth Assignments

Boat Cruise Clear Stage 9 while on the Suisui Boat.

Brand Equity Complete any manufacturer challenge category.

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

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

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

Area of Expertise Complete any gear challenge category.

Man No More Build a suit of powered armor.

Act IV Complete Act IV.

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

SKY SANCTUARY Restored! Restore the SKY SANCTUARY Stage Gate.
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You Can Pet The Dog Pet a Hellhound in MWZ

Feel Free Play all the Party Games in Free Play

Chromatic Apparatus Refilled the colored tanks

Bon Appétit Munch 5 bugs in one game

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

Rookie Finish the game on Easy difficulty.

Alpha Protocol Complete Operation Desert Spear.

Mission Complete Clear every stage.

Shameful Lose rock-paper-scissors even while using a Telepathy Ball.

Footy Foul Kill 2 enemies with 1 Slide Kick during Slow-Mo

Heavy Ordinance Specialist Destroy 50 Aerial Scorestreaks with Launchers in Multiplayer

Aviation ace Finish every level of the three types of PLANE challenges!

Data Theft Hack 10 computers.

Skitchin' Reach 200 km/h with the Hoverboard for 10 seconds while grappled to a vehicle

Beginner Artist Complete three Drawing Lessons in Art School

Complete part two Complete part two: Four Map Pieces

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

Go Figure Plant ShadowChild's figurine.

Complete part three Complete part three: LeChuck's Fortress

Reaper Defeated the Harvester ("The Golems of Amgarrak" downloadable content)

Help Desk Get the Blade lobby desk clerk to help you bypass security.

Mercy Kill 5 enemies while they are on fire in Chapter 3: Fire Sale

Shocking In Bangkok use the stun gun on 5 enemies

All in Find the Morenia

The Stick of Truth Equip a Legendary Bo (Claws of Awaji)

The Cathedral Split up and infiltrated the Cathedral

Complete part four Complete part four: Dinky Island

High Wire Act Kill 10 enemies while using a zipline

Black Belt Defeat 50 enemies with CQC.

Extract The Data... Get the data that Pritchard is after from within the Palisade Blade.