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

Defeated Londra and His Horus Defeated the awakened Horus and put a stop to Londra's plans.

Crystal Relic Master Unlocked all upgraded Knack characters

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

Debris and Ashes Reach the Observatory.

Forest child Complete the TAIGA level without attacking anyone or getting noticed.

Sonic Right Hook Completed "Bet On A Champ."

Can I Call You? Successfully asked a hostess out on a date.

Calling It In Get 50 kills with lethal Scorestreaks in Multiplayer.

The Gift that Keeps on Giving Experienced all 9 Game Modes and all 9 Modifiers of the Mutator.

He Who Doesn't Exist Defeat the Mysterious Man in Hollow Bastion.

Nifty Nonsense The fat monk failed, for he spoke too much.

...The Harder They Fall Destroy every Surveillance Airship

Mad Scientist Awarded for alchemizing 120 different items.

Dominion Wraith Flash Dominate 50 Uruks.

Last Action Hero Help Garland King finally finish her picture

Mission Impossible Complete the game on Zealot setting

Librarian Find all 70 hidden Diary pages.

Why Aren't You Laughing? Joker must defeat Batman with the final hit coming from Not So Funny Is It?

We Will Survive Win 15 matches in Team Survivors.

One Step Ahead Disarm ten trap mechanisms

Diamond Medal Defeated all bosses using Diamond Knack

Knowledge is Power Uncover the mysteries of the Lost Tomb of Otorongo

Throttled Escape Escape using a relic in Regular or Hardcore difficulty.

Completionist Complete all Extinction challenges and escape in Regular or Hardcore difficulty.

Going Down Enter the X-13 elevator.

Top Of The Food Chain You successfully killed 20 players with a pistol in a deathmatch.

Dinner at 8 Guide 8 Sacklings to the very end

Hipster Collect a total of 50 pieces of Epic Gear, excluding shaders

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

Yes, Very Subtle In solo play, complete a level without using your Abilities, including rush and melee

Lovers Quarrel Green Arrow must defeat Black Canary with the final hit coming from Target Practice

Equipped an Elite Coil or Weave Equipped an elite coil on a weapon or an elite weave on an outfit.

Wizardry Whiz Awarded for becoming a master magician.
Congratulations! You truly are a whiz at wizardry!

Your World, Your Rules Complete the game with any ending.

Tidyman Spend 500 chemical resources on cleaning weapons.

And STAY Down Perform 50 follow-ups in the main campaign.

No Longer Friends Cyborg must defeat Robin with the final hit coming from Apokolips

Rolling Heavy Kill 5 enemies using one burst of Unstoppable Force.

Sniper Kill 50 enemies at long distance.

All the Gears Earn 5 Gears in every Challenge.

The Commander You unlocked Commander Video! Double rainbow all da way!

Broken, Restored, Empty Complete the first Hospital sequence

Death From Afar Kill a Spitter using a ranged weapon.

Family First Find your sister.

Stay Down Knock an opponent into an Arena Transition 25 times

It's Art Find a permanent home for the squirrel statue.

Knack Master Completed all chapters on Very Hard difficulty

Treasure Hunter Held every weapon and accessory.

Know My Name Get on the Leaderboard for every Feat