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Hard Boiled Help officers Kurtz and O'Neal solve a murder case.

Master Ninja Complete any level using only the knife to kill enemies.

Zoologist Collect 20 critters

Soothing Sounds Use the music player for the first time.

Break the Bank Guess it was time to cash out.

I Believe Hakan Fly Rescue Hakan from the cultists

Dead-On Score 150 points at the shooting range.

Crack The E Nigma Solve every riddle on the island

Bombardier Collect the formulae for 6 different bomb types.

Bird on the Ground Shoot down an enemy helicopter with an RPG in the single player campaign.

No Holds Barred Defeat 5 enemies with Coco's Spin.

No stone unturned Find a secret area in the Arcade.

Chatterbox Complete all conversations with the Endurance crew.

Get Off My Cloud Get 100 High Fall take downs.

World's Greatest Detective Spirit of Amadeus Arkham revealed

Hearts and Minds Retrieve Manko's Necklace

Seeker Discovered a treasure chest

Twenty Seconds to Comply Complete Street Vulture's Turf quest.

No Matter What - Normal Complete the game on Normal

Get the Ball Rolling Solve a Labyrinth.

Parts Collector Acquired a Gadget part

Plastic Prison Breakers They had no way out.

Desert Storm Find the Desert Eagle in 'Crew Expendable' and kill 5 enemies with it.

Chose Afterlife Entered the Infraworld.

Last Known Position Lose the enemy 10 times

Photographer Use Photo Mode.

Sanctuary Complete "Sanctuary"

Welcome To Hell-A Survive a plane crash, get bitten, and create your first Zombie-Free Zone.

Touchdown! Get a Touchdown

Commonwealth Citizen Reach Level 10

It Took Two You did it! CO-LLA-BO-RATION!

Loom for Improvement Upgrade a piece of gear

New Squadron Record Complete the cargo ship mockup in less than 19 seconds.

Practice Makes Perfect Fully develop any skill.

Don't Mess With the Money! Complete Bank Heist quest.

Arkham City Sirens Drop in on an old friend

Master Blaster Kill 2 multiplayer enemies with a single explosive.

Down Boy! Kill a zip-lining enemy player in multiplayer.

That's a Knife! Fully upgrade the knife

Casual Girl Ordered a pizza, watched some TV and wore something casual.

A Friend in Need Find and free Dandelion.

Time Paradox Kill Makarov and complete your mission

Monkey Around In multiplayer, escape death 3 times by using the rope ascender.

Sock Getter Find 15 of Patrick's Socks

"This Guy Is Really Good" Score 200 points at the shooting range.

Three for One Earn a Triple Kill with a Level 1 Super Attack

Bug Sized Relaxation Release that tension at the root level.

The Man in the High Tower Find and use the hidden cache in 'Heat'.

Chain Gang Perform the Serpent's Fury 3 times

Fashionista Equip a full matching Gear Set