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People Person Become friends with at least three of your inner circle in one playthrough.

Ghosts of the Past Face all of Carver’s demons by completing all Co-Op only optional missions.

Parasite-Seeing In Shadows of Evil, kill 5 Parasites while riding on the train.

Twin Birdbrains Defeat the twin demons, Lechku and Nechku.

Finish Him? Perform any fighter's hidden finishing move

Communication Skills Endurance Co-op Challenge: Kill 5 enemies that have been marked by your partner

Between Technology & the Divine Complete & win the debate with Talos Rucker.

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

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

Guardian Do not allow any friendly armor to be destroyed during Act 3-5.

TLAD: The Lost Boy Become leader of The Lost. (The Lost and Damned)

Skelly's Last Lamentations Earn the second of Skelly's prizes

Knack Master Completed all chapters on Very Hard difficulty

Harsh Conditions Fulfill the 'Harsh Conditions' Prophecy

Best star pilot in the galaxy Destroy 10 TIE fighters within 2 minutes on the Beggar's Canyon mission

Los Santos Legend Congratulations! You're Vinewood's biggest star!

Gazebo Pay tribute to Jessamine one last time

Eddie Is Back Complete Eddie's Challenge

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

Conservation Extract all wild animal species.

No Furball on the Menu Make your way to shore without being swallowed by the Water Dragon.

Peekaboo! Peek sideways to look at the VR Heroes behind the final bridge in Monster Escape (playing as the VR Monster).

Gladiator school Survive 15 consecutive waves with each of the 4 characters.

The best laid plans Work with a Buddy to subvert a mission offered by a faction

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

Stargazer Unlock 15 astrariums in a single playthrough.

Up to the Challenge 1 Complete 10 challenges.

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

Dinner at 8 Guide 8 Sacklings to the very end

What Does This Button Do?? Complete Arcade Ladder without blocking (allowed to continue)

Alone Time Endurance Co-op Challenge: Spend at least one day more than 60 meters apart

All Creatures Great and Small Complete your Animal Tome.

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

The Royal Protector Finish the game with Corvo Attano

Tenacious Traceur Wallrun, Turn, Jump, Wallclimb, Turn, Jump, Wallclimb, Turn, Jump

You're so dead, you don't even know it Complete any Campaign chapter in 4-player co-op at any difficulty level

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

Challenge Accepted Complete all challenges in a single mission.

Dose of freaky ghost! Capture a scary ghost in any Ghost House level.

Monster Hunter Hunt 500 large monsters.

Special Class-A Complete game on Hard difficulty

End to Torment Fulfill the 'End to Torment' Prophecy

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

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

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

Scorched Earth Destroy all enemy vehicles and mortar teams while defending Firebase Ripcord in Fracture Jaw.

Pacifist Clear the "Intel Operative Rescue" Side Op without killing a single enemy

Hang 'em High! Kill 30 enemies while they're suspended in the air with the grappling hook.

Invincible Warrior Kill 50 enemies in a row with inventory weapons without losing health.

Mind Trip See all seven memory endings and play through all four path ends in Break on Through.