grim_reapper

Pinnacle Complete the "Vertigo" Special Ops mission on Veteran difficulty.

Robin Revenge Obtain 78 medals on the original Arkham City and Robin Bundle Pack ranked maps (as Robin)

Rookie Finish the game on Easy difficulty.

Bloody Lust Kill Isaac with Samson

Magic Socket Obtain the Magic Socket artifact.

One Down! Win in a Ranked Match.

A Time of Wood and Stone Gathered the lost lore of Cadash Thaig ("Witch Hunt" downloadable content)

BURG.L Flipper Save BURG.L after the Oak Tree Lab explosion

Dark Side Complete zone 21 without rescuing any survivors.

Head Trauma Use every type of melee weapon on a zombie

Compulsive Hoarder Obtain at least 100 hidden treasure items.

Feel the Beat, Y'all! Complete "Feel the Beat, Y'all!" challenge

Fully Improved: Summer Fully improve Summer's Sanctuary.

Mode master Win an online game of every mode in every difficulty at least once.

Can you dig it? Complete "Can you dig it?" challenge

A Blank Card Kill Isaac with Eden

Chapter 5 Speedrun Complete a Speedrun of Chapter 5 below the target time.

Nemesis Complete "Nemesis" challenge

Supernova Get 3 stars on each of the first 14 Echoes

To Jugger or to Jugger-Naut Kill all juggernauts after they land on Veteran difficulty in the "Vertigo" Special Ops mission.

Gabe Fan Collect all cassette tapes!

Get him! Win a Quick Race on a track in the Batcave (not unlockable in Split Screen).

Think fast! Finish trial #8 with at least 52 seconds left on the clock.

Escaped Awakening Escape Awakening for the first time in Regular or Hardcore difficulty.

Up close and personal Kill 10 enemies using melee

Chapter 7 Speedrun Complete a Speedrun of Chapter 7 below the target time.

Moskstraumen Activate a Conduit.

Real men don't need a map Just in case you picked up a shielding map

That Party was Ace Ace every Adventure level in The Journey Home.

The Force Complete Zone 18 without upgrading weapons.

Alpha Protocol Complete Operation Desert Spear.

Chapter 8 Speedrun Complete a Speedrun of Chapter 8 below the target time.

Let the Dog Out Complete "Let the Dog Out" challenge

Good Father Collect all robot pieces

Orb of Delusion Obtain the Orb of Delusion artifact.

The Bereaved Unlock Wendy

Mindful Vandalism Place a sticker or a decoration on another player's sackperson.

Monkey Obsessed! Collect every Monkey Toy in the game.

Flying Knives Kill 10 enemies with throwing knives.

Loyal Customer Purchased all upgrades in the Motor Forge

Fine Dining Cook a bug on the Roasting Spit

Leg frag Kill 10 enemies with mines

The River Complete "The River" challenge

The More, The Merrier Make five spirits reach an ecstatic mood at least once.

Egg-stra Awakening! Complete the Egg-Stra XP challenge and then scan an obelisk in the Invasion DLC package.

Wander and the Forbidden Clear the game in hard difficulty

Data Theft Hack 10 computers.

Golden Idol Perform every Single Player Skillshot in the game

Mercy Kill 5 enemies while they are on fire in Chapter 3: Fire Sale

Quill Tosser Killed a Tollusk using only Ground Urchins.