TwoBrownCows

Sisters of Athena Endurance Co-op Challenge: Kill a combined total of 25 enemies in a single Expedition

Don't Fear the Reaper 2 Defeat Kauline Grim (of the Grim Sisters)

Sisters of Artemis Endurance Co-op Challenge: Kill a combined total of 10 dangerous animals in a single Expedition

Beware My Power! Use Ring Surge 10 times.

Broken, Restored, Empty Complete the first Hospital sequence

The Watcher Defeat Algos' first form

Crystal Relic Master Unlocked all upgraded Knack characters

That's So Hot! Defeat 20 enemies with the Handgun

Sith Training Complete all Training Room lessons

Demolitionist Defeat 10 enemies with Hover Mines.

One Step Ahead Disarm ten trap mechanisms

Favorite Pastime Defeat 10 enemies with Baseball Bat.

Campaign Silver Obtain 72 medals on the original Arkham City campaigns (as Batman)

Take the stage Validate a Track in Track Builder mode.

A Blade of Memory Destroy all Teeth, Balloons and Jack-In-The-Boxes.

Distress Call Clear Mission 4.

Stingy Bastard Save more than 300 White Gems in your inventory

As Evil As Dead Complete Act 3 - Chapter 3 on any difficulty setting

One Thousand Suns Complete the Supreme Hybrid Boss Battle.

Lots of Whacking Win a game of Alien Abortion in the strip club

Locked and Loaded Defeat 10 enemies with Gatling Gun.

Blood On The Dance Floor Defeat 10 enemies with the Stomp Attack

Around the World Defeat 20 enemies with Mace Storm.

The Talkative One Defeat 20 enemies with the TEETHER

Diamond Medal Defeated all bosses using Diamond Knack

Annoying Mosquito Defeat Elliot Beast Boss

The Bird's Nest Complete Act 3 - Chapter 4 on any difficulty setting

Possession Clear Mission 5.

Octacide Defeat the Octaking

A Hole in your Head Perform 5 headshots in a row with your biggest gun.

All in the Wrist Defeat 10 enemies with Blade Whip.

Tekken Fanatic Complete all other objectives.

Not even a dent Complete a level with a custom made ship, without dying

Fork the Pork Kill 6 aliens with the forklift

In The Web Consume 50 Web Targets.

Hey, it's-a-me! Execute a stomp move on an enemy

That Old Familiar Feeling Clear The Hallway Of Lasers

The Big... You Know Complete Act 4 - Chapter 1 on any difficulty setting

Shut Your Mouth Perform a 99 hit combo.

Campaign Gold Obtain all 108 medals on the original Arkham City campaigns (as Batman)

Super Move Master Learned all super moves.

Fan Favorite Defeat 10 enemies with Rocket Punch.

Knack Master Completed all chapters on Very Hard difficulty

Great Demon World Village Complete Act 4 - Chapter 2 on any difficulty setting

For the Night is Dark Endurance Co-op Challenge: Clear 3 Enemy Camps at night in a single expedition

With Practiced Bravado 100 Kills During Shootdodge

Corruption Clear Mission 6.

Outsmarted In singleplayer, get a quadruple kill with a single Frag Grenade

Teamwork Endurance Co-op Challenge: Warm up from freezing by standing next to a campfire lit by your partner

In Plain Sight Evade 10 strike teams.