Diamades

The Patron Helped Madeleine open her shop.

Greenlight Protocol Powered the reactor.

Eye Contact Defeated an evil eye.

A Mere Shell Defeat the Vanitas Remnant.

All Star Get 100 Stars in S.T.A.R. Lab Mode

Spectrum Needler Buddy Acquired Spectrum Gatling, The Needler, and Udder Buddy.

Proud Player/Critical Competitor Complete the game in Proud or Critical Mode.

Things That Go Ka-Boom Learn how to craft Exploding Arrows

Lucky Stiff Found Lucky Montoya's body.

Pursuit of Knowledge Filled 80% of the Datalog.

Electric Whisper Learn how to craft Electric Arrows

The Warrior: Aqua Learn all of Aqua's Finish Commands.

Campaign Kitty Obtain all 108 medals on the original Arkham City campaigns (as Catwoman)

True Love Found Reunite Aym and Baal with Forneus.

Dream Dropper Drop 100 or more times.

The 40-Yard Digital Dash Breach: Succeed 3 Data Sphere deliveries.

Sapphire Beat the game with the Defect.

Light's Will Defeat Armor of Eraqus.

Mutt And Jeff Asked a companion to be the Bad Inspector.

Wishing for the Best Complete the "Last Wish" Raid.

Regenerate Help Sozo.

The Specialist Learned all the skills of a single vocation.

Super Collision Course Either on (at least) your 2nd playthrough or in Hard (or greater) difficulty, conquer the fierce battle at Glaivend Basin without using any items!

Freedom Escaped the yoke of eternity.

Insanity II Complete two games in Mass Effect Legendary Edition on Insanity without changing difficulty

The Warrior: Ventus Learn all of Ventus's Finish Commands.

Mercy Dealt the blow of deliverance.

I came in like a Resogun Accumulate a total Wrecking combo of 1,000 in Demolition mode

Closure Put an end to all things.

Darkness's Will Defeat No Heart.

Family Reunion Achieved a compromise between Olivia and Minnie.

Special P.E.T. Benefits Acquired Special Delivery, P.E.T., and Employee Benefits.

You're Not Worthy As My Opponent Breach: Send 3 Challenges.

Kindred Spirits Max out a Spirit's Affinity Level.

Extreme Manhunt Complete a Seasonal Manhunt mission on Challenge difficulty or above.

Medal Master Obtain 3,000 or more medals in Flick Rush.

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

Dream Piece Collector Obtain all Dream Pieces.

Bookwyrm This is proof that you've become quite familiar with the Library. How to obtain this is kind of a secret, but if you take the time to do a bit of reading now and then, you should be pleasantly surprised.

Sticky Fingers Steal an enemy's item using a weapon equipped with the Steal ability.

Donut Mess with a Cop Unlock Officer Dick.

Going to the Vet Earn the "Veteran" Challenge Collection.
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Chatterbox Sometimes, after you've found a discovery point or when you're at a save point, you have the opportunity to press L3 to initiate a conversation between your companions. This is proof that you've experienced many Things and had a lot of Opinions about them.

Time's Teller Defeat the Unknown.

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

Into the Manse Entered the duke's manse.

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

Headshunter Defeated a hydra or archydra.

Good Listener Found 20 Portable Phonographs.
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Seekers of Secrets Complete all Secret Portals as both Sora and Riku.