CESMonkey

Two's Company, Four's a Party Complete any Adventure level with 4 players.

First Step to Awesomeness Win an Online Match

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

Survivor Survive until Round 25 in Outbreak.

Hi Score Collect 1,000,000 points over all story levels you have played.

Finished, without fear. Finish the game with two Boss Stem Cells active

HYPER FEAT BOY Find the figurine of Hyper Feat Boy

Perfect Date Finish a level without taking damage.

This Is How Hot Dogs Are Made 10 Walkers Killed with Saw Blades in the Logging Camp

I'm Counting On You! Successfully use Energy Share

The third faction Rescue all the Buddies from their respective predicaments

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

PC Load Letter Use the 3D printer 15 times in a single match in Outbreak.

Acquire Waffle Weapons! Obtain the Ray Gun, DG-2, and the Monkey Bomb at the same time in a game. (Map Pack 3 only)

Prime Directive Shatter Skeletron Prime.

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

Falcon and the Snowman Complete Crime and Punishment in Single Player.

Two for One Complete Crime and Punishment in Multiplayer.

Dedicated Knight Complete 200 Event Quests.

"Passing through" Complete Training Course without getting failed.

The stresses were unbearable... Lose your first hero to heart attack

The Spice of Life Use three different types of Yamato weapons in a boss fight.

A Bridge To Somewhere Extend the bridge in Awakening in Regular or Hardcore difficulty.

ARCHIVIST Collect all documents

Avenged Confronted the culprit behind the Vael family's murder. ("The Exiled Prince" downloadable content)

Memento Gave Sebastian a family heirloom. ("The Exiled Prince" downloadable content)

Flyswatter Destroy all helicopters in the "Vertigo" Special Ops mission.

Ultimate Collector Find all treasure.

Real Estate Agent Have all possible town NPCs living in your world.

I've Got Your Back! Save an ally 50 times in 4v4 PvP matches.

Sync With Me! Successfully use a Synchronized Rush

Entrapment Kill 20 enemies with security guns in a single level.

Signing Day Announce where your college ball will be played at.

The epitome of Super Earth Complete all Trophies.

Elimination Master Win 20 Elimination PvP matches.

PHILIPPE Find the figurine of Philippe

All Creatures Great and Small Rescue every captured friend.

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

Nothing More to Collect Unlock all the playable characters and bonus items.

To Hell And Back Finish the game on Very Hard Mode with any character

Gabe Fan Collect all cassette tapes!

Heroic Training Completed training with Goku!

SPF 1000 Deliver the final blow to Orion using a solar flare.

Release the Kraken! Killed 20 enemies during the boat exfil in Rip Current

Under the Radar Select a Starting Location and use an Informant to smuggle an item into Milton-Fitzpatrick.

People of Earth, Please Lend Me Your Energy! Collect half of all skills.
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Bloody Lust Kill Isaac with Samson

Underwater Expedition Defeat Cetus while its head is underwater.

Supernova Get 3 stars on each of the first 14 Echoes

Tycoon Complete the GFO Oil Rig mission.