JohnnyKrypton

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

1000 Kills Kill 1000 enemies

Moving On Up! Collect 20 Specter Coins.

Speed Bumps Run over 500 characters in a single tank.

Squid Soup? Accept Jefferson's Soup

Indomitable Hunt 50 tempered monsters.

Factory Complete Complete the factory.

Proto Tyrant Down Fight off the Proto Tyrant.

"Teamwork" Endurance Co-op Challenge: Collect an Artifact while your partner is down

Perfect Knight - Day 2 Complete every challenge in Arkham City - Main Story, Side Missions, Upgrades, Collectables, New Game Plus and Riddler's Revenge (as Batman)

Challenge Accepted Complete all challenges in a single mission.

Thorn of Thanatos Get 30% bonus damage with the Pierced Butterfly

It Takes Two Defeat 3 foes using co-op moves with Oda or Tachibana.

First Contact Destroy all enemy spacecraft during the chase scene.

Xenaphobe Kill Space Brutina.

A Grand Experiment Performed an Electric Chair execution.

One does not simply... Walk into Mordor.

Special Class-A Complete game on Hard difficulty

Channel Changer Take control of the enemy held radio and capture it with just seconds remaining

Like lightning Use the Boost for a total of 30 minutes.

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

Auld Lang Syne Destroy two enemy robots who have been distracted by a cigarette.

Fisher is the Other Sam Proceed on the monorail in Act 3-4 without being spotted by the enemy troops or searchlights.

All New Machines Scanned Encountered and Focus scanned every new machine in the Burning Shores.
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Giant Crown Collector Obtain a gold crown for 10 or more monsters that appear from low or high rank.

Get Away from Her! Endurance Co-op Challenge: Kill an enemy melee attacking your partner

End to Torment Fulfill the 'End to Torment' Prophecy

Omega Destroyed Beat the Omega Weapon

Proto Tyrant Down Again Defeat the Proto Tyrant.

Alley-oop! Shoot down a Hunter or an Eliminator while they are jump attacking in the air.

Pro Catcher Capture 100 Monkeys.

For Those Hard to Reach Places Obtain the RC Car.

No One Left Behind Endurance Co-op Challenge: Revive a player 3 times in a single expedition

Warrior Monkey Play the Specter Boxing mini game.

Trick Arrow Skills Shoot a Lizard with a Special Arrow

Night and Darkness Fulfill the 'Night and Darkness' Prophecy

Infernal Arms Unlock all Weapon Aspects

Group Effort Reach rank 25 in any faction

Easy Runner Springboard, Wallclimb, Turn, Jump, Coil, Skill Roll

Troubleshooter Completed 5 types of Trouble Missions.

Don't tell the Elf... Throw Gimli 30 times.

Howlers ’til the End Side with the Howlers in the Dust District

Instigator Start a Spectated Arena Fight in a Settlement

Make a Point Achieve the highest score in the Shooting Range

It Begins... Complete 10 matches in Quick Match/Ranked Multiplayer.
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On Leather Wings Get picked up by the Infected Bat.

How 'Bout a Light, Bud? Defeat Mimicry Marcus with a Molotov Cocktail or a Napalm Grenade.

Pew! Pew! Pew! Kill 35 Space Amazons with the Laser Pistol.

Trash Into Treasure Sold old clothing at Furugi no Neuchi.

Hardcore Complete the game in Ranger Hardcore mode.