The hidden underground transactions in Gotham that decent citezens are unaware of.

Pieces of evidence stored at the Gotham Police Department, revealing the extreme depravity of the city's criminals.

A record of mysterious and supernatural events that occurred in San Francisco.

Records of some of Catwoman's most memorable thefts.

Everything in here is protected by doctor-patient confidentiality, so STAY OUT!

Items from Arkham Asylum, documenting the most dangerous and deranged criminals housed there.

Each file recorded by Batman contains important evidence and data on a deadly Gotham villain.

Listing powerful magical artifacts and items related to magical cases.

Key insights recorded by Batman about members of the Bat-Family that could save their lives... or take them down if they go rogue.

Ancient mysteries and unsolved enigmas of Atlantis.

The first Batarang designed by Batman, more clearly modeled after a boomerang. Despite the many later upgrades to his equipment, he keeps this prototype Batarang as a reminder to never stop improving.

Bruce Wayne from Earth-32 in the Dark Multiverse became a Green Lantern, but his strong willpower allowed him to overcome his ring's prohibition against killing by filling it with the void in his soul caused by the death of his parents. Destroying the Guardians and the Green Lantern Corps, he became the Dawnbreaker and joined the Dark Knights.

A meticulously organized record of all illegal items smuggled by the Penguin, in a code known only to him.

A ledger that records the names of all individuals who have made deals with the Dark Knights.

A living spore inside a green-striped glass tube, causing hallucinations of transforming into a plant when inhaled.

Each ID is meticulously forged, making it difficult to distinguish from real ones.

Examples of various exotic substances used for enhancement or attack. It is said to include Joker toxin, fear gas, Venom, and more.

A detailed map marking secret routes for moving undetected through Gotham City, highly sought after by major crime organizations in Gotham.

Tools used for hacking and stealing information. The Riddler and other tech criminals often use them to obtain confidential information.

A rusty iron mold used to forge the double-sided coin that decides life and death. Harvey Dent's fingerprints are identified on the exterior.

A torn page from a notebook, outlining the lethal synthesis steps of Scarecrow's "Fear Formula".

A sample of toxic vines containing unknown dark energy, requiring proper containment.

A mask used to intimidate victims in multiple terror attacks.

A scope found at a shooting scene, with a partial fingerprint linked to Floyd Lawton, aka Deadshot.

A hard drive corroded by acid. Techs were only able to read partial scrambled codes.

It is said that this wind chime can summon spirits.

A rune stone said to open portals to other dimensions, discovered at the scene of multiple supernatural events.

A seed seemingly corrupted by Dark Multiverse energy, which, if planted, grows into an aggressive, mobile plant.

A yellowed ticket stamped with Destination: Purgatory, which causes the holder to suddenly vanish. Handle with instruments only.

Embezzlement records of the orphanage administrator, obtained by Selina Kyle during her time there. One of her earliest trophies.

A naturally formed crystal butterfly made of precious stones. Catwoman stole this and replaced it with a fake without the owners even realizing it.

A valuable heirloom in a cartel family that became the center of a war between them when Catwoman was hired to steal it.

I love to start my day with a feel-good mantra! "You are not insane!" "The law does not apply to you!" "That guy deserved a few broken bones!" Self-love is the foundation for all the other kinds, am I right?

Exclusively provided by the Iceberg Lounge, used for secretly contacting buyers and sellers, ensuring transaction information is not leaked.

A lead-lined lockbox containing small fragments of green Kryptonite, causing a frenzy at black market auctions.

A broken glass vial with a label bearing the scrawled words "Last Injection". It says something about Gotham that we have multiple possible suspects.

A pink wooden bat with The Joker's green hair strands and bloodstains retrieved, multiple DNA samples identified.

A metal fragment of incredibly sophisticated workmanship. Thus far, no identifying characteristics have been found pointing to an owner, aside from the obvious bat wing shape.

A tile in Union Square that is said to retain traces of some evil ritual.

Accounts of multiple witnesses' supernatural experiences, recorded by authors using the pseudonyms Cain and Abel.

A silk cut cigarette engraved with sigils, confiscated at a local bar.

A mysterious incantation that can only be clearly heard when played backwards. Multiple examiners report that playing it normally summons "mirror creatures".

Catwoman repeatedly stole this diamond from the same museum to force them to protect it with better security. She admired its beauty but wanted it to be safe from thieves.

Catwoman was paid one million dollars to steal an old gun. She later learned it had the power to kill demons, and she'd been hired by one, so she teamed with Tommy Monaghan, aka Hitman, and the demon Etrigan to get it back.

The Starlight Diamond Necklace, worth a fortune, is one of Catwoman's many trophies.

A gem stolen from the Gotham Museum, rumored to have been later used to craft her and Batman's wedding rings.

These costumes are ADORABLE! This one makes 'em look like a giant banana! Don't ya just wanna kiss their bellies? But don't, 'cause they'll maul ya.

The great thing about Suicide Squad pardons is it's pretty easy to turn a 3 into an 8 or a 1 into a 7 on the date and just reuse it! If Waller finds out, no biggie, I just gotta kill some dictators. Easy peasy.

Okay, look. Let's say you had old photos of you with a toxic ex, where you looked really good, butt like pow, abs on point, hair doing just what it should. What would you do? Snip, snip, snip!

That's right. Ya girl won a bunch'a gymnastics trophies and a scholarship to Gotham State University! What, you thought I was just a big brain?

Various powerful magical charms and amulets that can protect the wearer from supernatural forces.

A magical item used by Zatanna in her stage show, also capable of summoning various objects and creatures when combined with her natural sorcerous abilities.

A jewel made of dark matter, capable of absorbing and manipulating dark energy, and often the prison of the demonic entity known as Eclipso.

An up-to-date list of addresses collected by A.R.G.U.S. for locations of rituals. It seems Trigon's cultists are planning something.

The first item that Catwoman ever stole was a cat-shaped Christmas ornament.

An extraterrestrial mineral capable of weakening Superman. Catwoman accidentally acquired it during a heist. Rumor has it she tried to give it to Batman in exchange for a date.

Uh-huh, I got a degree in psychiatry! So when I say yer whacko, I ain't just talkin'. That's a professional diagnosis!

When Ivy's not around, I like to talk to the plant. I ask her if she can hear me, and she says "Sometimes". At first, I thought she was lying, but then Peacemaker started bothering me, and the cactus smacked him right in the family jewels, so...

Hey, show me where it says I can't have a bazooka! Can't find it, huh? That's what I thought.

Records the daily activities of the patients at Arkham Asylum. May be too intense for sensitive viewers.

A blood-stained electronic access card, with its magnetic strip helping numerous patients escape before its excessive use triggered an alarm.

This is the handiwork of Killer Croc during an inter-patient conflict. He later faced Bane's retribution. Despite best efforts, such fights are inevitable.

Contains scarlet vines that secrete hallucinogenic spores, seemingly the cause of an incident where the medical ward's ventilation system failed.

A wall violently destroyed by Bane, just one of the many breakouts in the history of Arkham Asylum.

These notes on Scarecrow's fear toxin show he is constantly refining it... not to improve it, but so he won't become immune to it. He's addicted to fear. He enjoys it.

Taken from the remnants of Mr. Freeze's wife Nora's freezing coffin, it contains detailed records of her medical history.

Laboratory reports show that the regeneration rate of the scales exceeds biological limits... His constant consumption of live prey is not due to hunger, but perhaps out of fear of reverting back to the "sewer monster".

The Penguin occasionally calls to give me intel on Gotham's criminals, hoping it will make me lenient towards his non-violent crimes. Instead, I record his calls as a valuable source of information.

A lighter used by John Constantine, ignited with Lucifer's flame, capable of burning spirits and demonic contracts.

Zatanna has long been the most famous magic-wielding member of the League, but before her, her father used magic to fight crime.

An ancient magical box said to contain all evils and disasters, opening it releases powerful dark forces.

Stephanie Brown's training log as Spoiler, Robin, and Batgirl, documenting her training process, challenges, and growth experiences.

The Atlantean Helmet is one of the seven weapons of Atlan, the first king of Atlantis, used by Aquaman and The Others and sought by Atlan himself when he returned as the Dead King. It enables the wearer to survive without food, water, or oxygen.

The Atlantean Key is one of the seven weapons of Atlan, the first king of Atlantis, used by Aquaman and the others and sought by Atlan himself when he returned as the Dead King. It lets the user open any doors.

Atlan's Scepter was one of the seven weapons of Atlan, the first king of Atlantis, used by Aquaman and the others and sought by Atlan himself when he returned as the Dead King. It allows its holder to cause massive earthquakes.

The Globe of Transportation is one of the seven weapons of Atlan, the first king of Atlantis, used by Aquaman and the others and sought by Atlan himself when he returned as the Dead King. It empowers the possessor to travel anywhere.

Bruce Wayne from Earth-32 in the Dark Multiverse became a Green Lantern, but his strong willpower allowed him to overcome his ring's prohibition against killing by filling it with the void in his soul caused by the death of his parents. Destroying the Guardians and the Green Lantern Corps, he became the Dawnbreaker and joined the Dark Knights.

Batman of Earth-44 in the Dark Multiverse asked Cyborg to create a digital version of Alfred after Alfred was killed by criminals. The Alfred Protocol, however, sought vengeance, which led it to take over Batman's body and make it into a high-tech cyborg form. He proceeded by killing anyone he determined to be a threat and eventually joined the Dark Knights.

Hey, it was super nice of Batman to have his grandpa stitch up my wounds and all. I'm not gonna go back there and steal anything. Probably. Besides this access card, I mean. But I just gotta get a selfie with that robot dinosaur.

Seemingly ordinary cleaning supplies that became ingredients for The Joker's venom.

No one but The Penguin knows how many hidden deadly devices are concealed within the umbrella.

I keep Harvey Dent's court transcripts in the hopes that one day I can show him Two-Face isn't who he is. But the more I read them, the more I realize his ability to argue multiple sides shows Two-Face may have always been part of him.

The Riddler has used a puzzle simulator to run simulations of whether I'm likely to guess the solution to his traps. But it hasn't worked, because his device hasn't been able to accurately mimic my mind.

A mystical resurrection pool used by Ra's al Ghul, capable of healing wounds and extending or even restoring life.

An ancient Egyptian amulet symbolizing immortality and protection, once used by Doctor Fate.

This treatment plan for Selina's sister was devised by the top psychologists in the world. The X factor is that the patient has to want it to work.

Alfred's contingency plans for the Bat-Family, detailing response strategies for various crisis situations, from exposure of identities to my going rogue. I haven't seen those last plans, and if I ever access them, they take effect immediately.

There are no studies on the effects of long-term Lazarus Pit exposure on a person's genetic code, especially from early childhood. Damian wouldn't like being the subject of the first such study, but for his sake, he has to be.

I can't condone the extreme methods Jason uses as Red Hood. I've prepared these resources—financial, medical, and psychiatric—for him. But after the way I failed him, I understand why he won't accept them. Maybe one day he will.

The Manacles of Force are among the seven weapons of Atlan, the first king of Atlantis, used by Aquaman and the others and sought by Atlan himself when he returned as the Dead King. When clashed, they create force fields and shock waves.

The Power Glove is one of the seven weapons of Atlan, the first king of Atlantis, used by Aquaman and the others and sought by Atlan himself when he returned as the Dead King. It enables the wearer to disrupt both objects and magical fields.

The first Batarang designed by Batman, more clearly modeled after a boomerang. Despite the many later upgrades to his equipment, he keeps this prototype Batarang as a reminder to never stop improving.

The police badge worn by James Gordon when Batman first appeared. It commemorates the informal alliance they formed within a corrupt police department to turn Gotham around.

The Batman of Earth-12 in the Dark Multiverse fought the God of War, Ares, with his lover, Wonder Woman. After Ares seemingly killed Diana, Batman put on Ares' helm to gain the power to kill him in return, but he was corrupted by it, and when he saw Diana was alive, he killed her rather than give up the power. He then joined the Dark Knights.

Bryce Wayne from Earth-11 in the Dark Multiverse saw her lover Sylvester Kyle killed by metahumans. Vowing revenge, she killed all metahumans on her Earth and then went to war against Atlantis, adapting her body to survive underwater. She killed the Queen of Atlantis and took her trident before joining the Dark Knights.

Mr. Freeze will die without freezing temperatures. However, the liquid nitrogen required to maintain that level of cold can be used as a weapon if he ever gets his hands on it.

These seeds of a plant extinct since Ancient Rome were abandoned by Poison Ivy in order to save the life of Harley Quinn. Despite what Ivy says, she hasn't given up her humanity, and this proves it.

The Joker infected fish with his toxin, giving them bizarre grins and poisoning them as part of the food chain. He actually tried to patent the Joker Fish. The key to understanding The Joker is that it's not about the crime itself—he needs an audience.

The vessel of Nabu's power, granting the wearer the ability to wield the magic of the Lords of Order.

This implant allowed Barbara to walk again after The Joker's gunshot paralyzed her. If enemies find a way to interfere with it, they'd take her down in seconds. I need to find its vulnerabilities, so I can shield them.

Tim has the finest deductive mind I've seen in a person. If anything happens to me, I know he'll pursue these cases until justice is done.

The Seal of Clarity is one of the seven weapons of Atlan, the first king of Atlantis, used by Aquaman and the others and sought by Atlan himself when he returned as the Dead King. It translates any language, so the user can understand it.

The Trident is a magical weapon created by Atlan, the first king of Atlantis, that grants its wielder great power and the divine right to rule the sea. It is currently held by Aquaman.

The costume left behind by Jason Todd (the second Robin) when he was brutally killed by The Joker. Batman keeps it sealed deep within the Batcave as a constant reminder to himself, for even though Jason returned as the Red Hood, the person he was is gone forever.

Batman and Catwoman almost married, but at the last moment, she backed out, fearing that marrying him would destroy the part of him that made him effective as Batman. Batman keeps the ring in case they get another chance.

A "master key" card configured to open every door in Arkham Asylum, the place that holds Gotham City's most dangerous criminals.

This toxin is one of The Joker's deadliest weapons. The vial bears The Joker's signature smiley face label and the death-grin it leaves on the faces of its victims.

On Earth-1 in the Dark Multiverse, Superman went mad and began killing his loved ones. To stop him, Batman infected himself with the Doomsday Virus, becoming powerful enough to kill Superman. Realizing he now carried the Doomsday Virus, he joined the Dark Knights.

Batman on Earth-52 in the Dark Multiverse merged with his world's Flash, claiming he needed the Speed Force to be fast enough to stop all crime. Controlling their joined body, he killed all his enemies on that world and then joined the Dark Knights.

Batman from Earth-22 in the Dark Multiverse killed The Joker, unleashing a Joker Venom that infected him, making him a deadly hybrid of Batman and The Joker. He founded the Dark Knights and sought to spread their madness throughout the Multiverse.

Records of multiple sessions between Dr. Harleen Quinzel and The Joker. While she concealed her true feelings about her patient, in retrospect, the signs are there. Note the hearts used to dot several "i"s.

Talons are a group of deadly assassins who are absolutely loyal to the Court of Owls. They lie in wait in their hidden chambers until they are summoned and stop at nothing to complete their task.

Nightwing provides an invaluable analysis of where I need to improve. "Stop hiding things from people who love you" was part of his latest findings.

Regular psychological evaluation reports conducted for each member of the Bat-Family, detailing their mental state and potential issues, myself included.

The Tear of Extinction is a deadly weapon from Atlantis, created by the sorcerer-king Arion, that can kill even gods.

The proposed roster and action plan Batman devised when assembling the Outsiders, a team he put together when the Justice League refused to intervene in a country's civil war.

An heirloom of the Wayne family, this pocket watch is not only a remembrance of Bruce Wayne's parents but also of his motivation to become Batman.

Batman's journal provides insights into his personal thoughts on his cases, his allies and enemies, and himself.

A detailed map recording the various worlds of the Dark Multiverse, showcasing the range and targets of the Dark Knights' operations.

The mysterious dark god of the Dark Multiverse, worshipped by the Dark Knights. It's unclear if he is a symbol or an actual being.