Norbe_16

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

Donut Mess with a Cop Unlock Officer Dick.

Street Fighter Complete all Dragon's Teeth Assignments

Survivor Survive until Round 25 in Outbreak.

Alright, Alright Survive until round 10 in Infection.

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)

Going to the Vet Earn the "Veteran" Challenge Collection.
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PC Load Letter Use the 3D printer 15 times in a single match in Outbreak.

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

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

Go Figure Plant ShadowChild's figurine.

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

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

Expose The Truth! Decide what to do with the evidence you uncovered.

AMG Completionist Gain all stars in 'AMG'.

1-Upsmanship Complete Extra Life Mode with 5 Extra Lives in your Inventory (Ancient Gods 1)

Sack the Postman Post all 6 invitations for the party.

Hard Headed Collect 1000 helmets

Reinvent the Weapon Wheel Re-collect all of the weapons on the Weapon Wheel

Get him! Win a Quick Race on a track in the Batcave (not unlockable in Split Screen).

Clean Sweep Complete the System Rift Jensen Story without killing anyone.

Campaign Wonder Obtain 114 medals on the original Arkham City and Robin Bundle Pack campaigns (as Robin)

Campaign Nightwing Obtain 114 medals on the original Arkham City and Nightwing Bundle Pack campaigns (as Nightwing)

Controlled Chaos In Revelations, override all of the Corruption Engines before round 6.

It's a Trap! In Shi No Numa, kill at least one zombie with three different traps in a single round.

A Just Cause Decide what to do with the Altered Biocell.

King in the North Complete all Final Stand Assignments

I am death incarnate! Beat the game on "I am death incarnate!" difficulty or higher

Not One Inch In Gorod Krovi, complete a Lockdown Event.

Murder He Wrote Find all pieces of evidence behind the Saridakis murder.

Live Die Reload Complete Extra Life Mode with 5 Extra Lives in your Inventory (Ancient Gods 2)

Queen Firefly Kill 15 enemies with Marlene's assault rifle in one encounter in No Return
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Game Over Beat Horde Mode

My precious Gather all the treasures

Too Hot to Handle Complete the server chamber area without being detected by any HeatEye cameras or enemies.

May Your Death Be Swift Win a Daily Run of No Return on Grounded difficulty

Knock Knock Get Slaw to open the security door within the Palisade Blade.

A Criminal Past Complete A Criminal Past.

Don't Reach, Kid Find the basketball and put it in the hoop.

Collector Extraordinaire Collect 100% of the Prize Bubbles in The Journey Home.

This Make You All Nostalgic? Complete the Part I challenge track in No Return

Coroner Find all of the wearable items that make up the Taken Shape.

Reunion Visit another Player's Base

Sanguine Serum In Zetsubou No Shima, drink fresh Widow's Wine.

Quid Pro Quo Help out a fellow inmate by making a trade.

Code of Conduct Complete A Criminal Past without killing anyone.

Dressed for the Occasion Blend in with the proper prisoner jumpsuit.

Biology Lesson Kill a Bloater with the pump shotgun as Bill in No Return

Splicer God Complete the "Wrath of the Machine" raid on heroic difficulty.