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Deadhead Get 150 zombie headshots in a single game. (Map Pack 2 only)

One with Oblivion Defeated Lambda Theos. Impressive!

Blue Lagoon Clean Sweep Complete all Sector Challenges in Blue Lagoon.

Reaper Defeated the Harvester ("The Golems of Amgarrak" downloadable content)

Burning times Complete a level on Master difficulty without using bombs, overdrive or boost with a custom ship

Terma-nated Defeated Solomus and the Terma Ten.

Song of Torukä Na'rìng Secure the song in Torukä Na'rìng.

The Clockwork Tomb Complete the quest: The Clockwork Tomb

Who Were Those Guys, Again? Defeated Veigue, Reala, and Amber.

It's a Trap! Kill at least one zombie with three different traps in a single round. (Map Pack 2 only)

Faith in the Fallen Take a leap of faith

Slow and Steady Win an action race without using any boost, or using a boost pad

Slumming Complete all the Midtown missions in a single player campaign.

Sack the Postman Post all 6 invitations for the party.

Speed Wash Wash your pet in under 60s

Secret Mission 15 Use Karol's Nice Recovery Smash arte to heal Zagi's poison in the fourth battle against him.

King in the North Complete all Final Stand Assignments

Campaign Wonder Obtain 114 medals on the original Arkham City and Robin Bundle Pack campaigns (as Robin)

Campaign Nightwing Obtain 114 medals on the original Arkham City and Nightwing Bundle Pack campaigns (as Nightwing)

Blitzkrieg Complete the single player campaign in under 12 hours.

Insert Coin Complete all achievements in one game from The Arcade.

Harmonic in the FEBA Score a harmonic from the FEBA.

Song of Va'erä Ramunong Secure the song in Va'erä Ramunong.

Bandits Defeat 500 Bandits

Worst Nightmare Master the Worst Nightmare Dark Knight track

Let it Snow Receive the Extreme Environment Suit (XE Suit)

A Gentlemanly Triumph Defeated a true Gentleman. Good show!

Secret Mission 11 Destroy the core in the battle against Outbreaker to prevent magic from inverting day and night.

Song of Kxanìa Taw Secure the song in Kxanìa Taw.

Breeding Master Bred successfully at least 20 times.

Balancing Act Balance another sackperson on an object while lifting it with touch.

Drilling for Justice Assemble the cryonucleation tunneller - the cryodrill

Flipper Flip the level 6 times in Protector mode

Creative Thinker - Mini-Golf Complete the 'Mini-Golf: Play & Edit' template

Mixer Maxed Maxed out your Eleth Mixer by boosting its eleth capacity to 9999.

More Tawtute Will Come Finish the game on the Na'vi side.

Collector Extraordinaire Collect 100% of the Prize Bubbles in The Journey Home.

Stalact-tactician Takedown 2 enemies with one stalactite

Day 3 Mastered Complete all Day 3 challenges at gold level

Seriously Overpowered Equip a gilded, unique, fully enchanted weapon.

Varterral's Fall Defeated the varterral on Hard or Nightmare difficulty ("Witch Hunt" downloadable content)

For Auld Lang Syne Stop Freeze and bring Boyle to justice

Grave's Bog Harmonic Score the harmonic in Grave's Bog.

Legend of the Dark Knight Complete all Dark Knight challenges

Creative Thinker - 2D Platformer Complete the '2D Platformer: Play & Edit' template

Secret Mission 13 Time your strikes between Nan and Tison's attacks to knock them down.

Coroner Find all of the wearable items that make up the Taken Shape.

True Grace You've accomplished everything!
Thanks for playing!

Early Bird Successfully woke up a total of 200 times.

Big Top! Achieve a score of 2500 or higher in "Gonzo's Endless Cannon Run Ride!"