xImpossibility

Dinner Date Pigsy's Perfect 10: Collect all hidden food and pin-up girls.

Blood Rights Kill Satan with Samson

Fully Loaded Maximize all upgrades.

Just Like Old Times Dispatch the professor with a shot to the groin.

Seekers of Secrets Complete all Secret Portals as both Sora and Riku.

True Completionist Cleared all areas on hard difficulty!

One and Done As Murray, defeat 5 guards with the Fists of Flame.

Farewell to a Friend Put a friend out of their misery.

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

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

Bollywood Will Have to Wait Complete all jobs in Episode 3: The Predator Awakes.

Raksha Research Initiate Upgraded to Defense Level 3.

Champions of the Cathedral Complete all Special Portals in La Cité des Cloches as both Sora and Riku.

Don't make me pull the trigger! Survive for 5 minutes in Demolition mode

Celebrated Master of Ognapology (Ognadae Tetratetron) Find four different species of Ognapod.

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

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

Pied Piper of Squirreldom Have 5 squirrels following you around at the same time

The Most Famous Hedgehog in the World Have your photos taken in Studiopolis Zone

Champions of All Districts Complete all Special Portals in Traverse Town as both Sora and Riku.

Hard pressed Complete all levels on Hard

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

Aries B Solved the second Aries riddle

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

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

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

Virgo B Solved the second Virgo riddle

The Queen's Delusion Stopped the Serpent Queen from sealing her citizens away from the world.

Champions of the Dark City Complete all Special Portals in The World That Never Was as both Sora and Riku.

Like a glove… Finish trial #6 with 3 hearts left without picking up a spell.

Champions of the Digital World Complete all Special Portals in The Grid as both Sora and Riku.

Champions of the Endless Ocean Complete all Special Portals in Prankster's Paradise as both Sora and Riku.

The Bereaved Unlock Wendy

Closing the Experiment Log Earn ALL of the platinum Flashback Relics

Outta Spooce Reach the tunnel on the other side of SpooceShrub Forest.

Avarice in the Neon City Deposed the Crime Lord Mara and ended his insatiable greed.

Champions of the Opéra House Complete all Special Portals in Country of the Musketeers as both Sora and Riku.

Champions of the Harmonic Score Complete all Special Portals in Symphony of Sorcery as both Sora and Riku.

Save some room Finish trial #20 one unit below the zapper.

It's a Shocker Open the vault in Episode 3: The Predator Awakes.

Views From the Abyss STU: Complete "The Spider's Thread" mode.

Wander and the Forbidden Clear the game in hard difficulty

Aw, Shucks Pick up the Princess 200 times

Chapter 9 Speedrun Complete a Speedrun of Chapter 9 below the target time.

Sector 6, Completed Complete Sector 6

Tough Going Complete the hardest puzzle in the game

Test Subjects Use sheep as test subjects in 6 levels

Cloak and Dagger Met secretly with the agent of the Divine. ("The Exiled Prince" downloadable content)

Bloody Lust Kill Isaac with Samson

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