The Joker (Arkhamverse)

One of Batman's oldest enemies and arch-nemesis throughout his crime-fighting career, the Joker is responsible for some of the most horrendous and tragic moments in Batman's life, cultivating in an extremely long and brutal battle where there seems to be no end in sight. An insanely homicidal super-villain with no powers beyond his capacity for incredible violence and creating deadly mayhem, the Joker's white skin, green hair, and blood-red lips belie the chaotic nature underlying his colorful appearance. Leaving a trail of death and destruction wherever he goes, Joker's only motive in life is to create as much mindless violence and chaos as possible and enjoy in a game of cat and mouse with his nemesis, Batman, whom he disturbingly views as both his greatest enemy and friend. He frequently concocts complex and elaborate plans to entrap Batman and destroy Gotham City, often resulting in the deaths of hundreds and thousands of innocent individuals.

Biography
The self-styled Clown Prince of Crime has no superpowers, beyond a capacity for incredible violence and a skill at creating deadly mayhem. He frequently concocts elaborate schemes to entrap his arch nemesis, Batman.

Attributes:
 * Unrepentant homicidal maniac, albeit without a precise psychological diagnosis
 * Surprisingly strong hand-to-hand combatant
 * His past is unknown; conflicting, unconfirmed reports state that he was a failed comedian, a petty thief, and a broken family man
 * Employs various deadly weapons, often based on party-gag items
 * Frequently uses a toxin that stretches victim's face into a Joker-like grin and causes death

Road to Arkham
The Joker and his goons raided Gotham City Hall and took the Mayor hostage, tying him up and strapping a bomb to his chest. As the Joker taunted the Mayor, he expressed his displeasure that Batman hadn't shown up who ironically attacked moments later. The Joker tried to escape via a large parachute but was stopped by Batman, who proceeded to escort the Joker to Arkham Asylum.

Batman: Arkham Asylum
"It's over, Joker!" "Over? Why my dear delusional Dark Knight, it hasn't even begun!"

- Batman and Joker confront each other

Batman arrived at Arkham in the Batmobile, taking the Joker to the Intensive Care Facility. The Joker remained in high spirits, pleased that he was back in Arkham. He was strapped to a prisoner movement trolly and wheeled through Intensive Care by a variety of guards, including Frank Boles, with Batman following close by (Batman sensed that something was amiss, so he intended to follow the Joker in case Joker intended to do something within Arkham Asylum). The Joker commented on all the brand new security at Arkham and how it was rather funny that a fire at Blackgate Penitentiary sent over a hundred of his goons to Arkham, with Boles angrily remarking that he thought Joker was to keep quiet. During the escort, the Joker made shrewd remarks to many of the Arkham Staff including Warden Quincy Sharp, Officer Aaron Cash and Dr. Penelope Young before being taken down the elevator. During the elevator journey, a blackout occurred causing the Joker to laugh hysterically before having his neck clutched by Batman as the lights turned back on. As the Joker was moved into the lobby area, he was unstrapped and escorted by a guard and medical assistant while Batman and Commisioner Gordon looked on. Unbeknown to all but Joker, Harley Quinn was already in the security control room, waiting. Joker soon took the opportunity to break free as Harley's signal.

"Welcome to the madhouse, Batman! I set a trap, and you sprang it gloriously! Now let's get this party started!"

- The Joker proclaims his trap for Batman

Pretending to stumble and trip, the Joker bashed his guard in the face with the back of his head as the guard demanded him to get up. He then used his handcuffs to strangle the guard, forcing the doctor to unhook the Joker to save the guard. Joker strangled the guard to death before the doctor could save him, and when his cuffs were finally off, kicked the doctor down, killing him as well. The Joker then coldly said to the dead guard "The choke's on you!", imitated a playful laugh, and pointed at the security door with a "Ta-da!". He looked up at the security camera and told Harley he was home. She then let him in by opening up the adjacent electrical doorway, allowing the Joker to access the cell controls. He ran behind the energy screen just as Batman managed to break through the viewing window and into the room. He taunted the Dark Knight for springing his trap and released his followers from Blackgate out of their cells, saying "Now let's get this party started!". As Batman battled the thugs, Joker said over the monitor system that he was originally going to kill everyone in the room and watch cartoons, but decided to take a captive audience instead. After Batman defeated a round of thugs, the Joker left the room and made his way to the patient transfer unit.

Batman told Gordon he would find them a way out, but Joker told Batman not to make promises he couldn't keep, as he was in control of the asylum and therefore where Batman was able to go. As Batman told Joker he wouldn't let him run, Joker cut off his "hero speak" and goaded him to just pursue him. Batman followed Joker's trail of smiles and arrows drawn by spray paint and dead bodies and found Joker. The Joker opened up a large patient transfer cell, releasing a large experimental monster (bearing resemblance to Amygdala). The monster attacked Batman before dying of biological causes, much to the Joker's annoyance, who murmured "Note to self: Need stronger test subjects!". As a result, the Joker allowed Batman one free shot at him, which would cause him to fall to his death and end the madness. Batman drew a Batarang, but hesitated and was unable to willingly kill his enemy, causing the Joker laugh at him and say that he was becoming "too predictable". He escaped via the patient transfer system and told Batman that he was organizing a "party" with the villains all over Arkham. Whilst Batman tried to get the transfer unit working again, the Joker appeared on a monitor showing Batman an image of a treacherous Frank Boles knocking out Gordon and taking him hostage, ready to kill him.

Batman attempted to track down Gordon anyway, by detecting the alcohol Boles left in the air. Along the way, Joker left traps with Joker Venom as well as many gag chattering teeth. The Joker soon caught onto the Batman's attempt and as a result had Boles killed, no longer needing him. The Joker took control of Arkham's intercom system, telling his goons to destroy the Batmobile as he took over the West side of Arkham Island.

His next target was the Medical Facility where he ordered his goons to round up all the doctors in the area, most importantly Penelope Young, who he needed the Titan formula from. To the Joker's annoyance, Batman defeated his goons and rescued the captive doctors. The Joker drew up a 'party list' which contained the individuals who would help take care of Batman. He enlisted the help of the Scarecrow, who proceeded to attack Batman in the Medical Facility. After escaping Scarecrow's Fear Toxin hallucination, Batman made his way to Gordon, who was conveniently placed near Bane's holding cell.

After Batman rescued Gordon from Harley, the Joker pumped a large amount of Titan into Bane, causing a fight with him and Batman. Joker was disappointed with Bane's inability to kill Batman, so he ordered his goons to assist him, though Batman defeated them all. The Joker's next order of business was to search Arkham Mansion for Dr. Young's formula, and Dr. Young herself, who had gone looking for said formula.

After finding Zsasz in the Botanical Gardens, the Joker enlisted his help to deal with Dr. Young. Zsasz held Young by a knife in Warden Sharp's office and threatened to kill her if he saw Batman approaching. Joker told Zsasz to just kill her, as she was useless to him since he had already gotten both Venom and Titan. Batman incapacitated Zsasz and rescued the doctor, though an explosion set by Joker in the Warden's safe killed Young anyway. Harley then entered and had her thugs prepare Batman for the 'party'. He defeated them and followed Harley, rescuing Sharp by tracking his DNA. Harley was shown releasing Poison Ivy from her cell, despite Ivy not being on the 'party list', much to Joker's apparent pleasure. He then unleashed the more violent, insane inmates all over the island.

Batman went after Harley, who sent her thugs after Batman again, though he managed to defeat them all. Harley's failure prompted Joker to remove her from the 'party list', and Batman defeated and locked her up, using her DNA traces from around the island to track Joker to the gardens, where the villain unsuccessfully tried to slow Batman down after killing an Arkham guard, Thomas Armbruster.

He demonstrated the successful Titan strain he had managed to create by injecting two of his thugs and having them attack Batman before escaping. Batman defeated the monsters and pursued Joker, who revealed over the intercom that he had teamed up with Poison Ivy and injected her with Titan, causing her to become far more powerful and take control of the island surface with her evolved plants. Batman defeated Scarecrow and Killer Croc down in the sewers and successfully harvested the spores needed to make an antidote for the Titan injection in Croc's lair. Batman then went down further into the sewers and found that Joker was trying to pump Titan polutants into Gotham, telling his men to stop Batman from preventing this in a threatening, serious manner. After Batman shut off the pumps, Joker sent a Titan monster as a token of his displeasure.

Batman defeated the monster and escaped the sewers. Driven by more power hunger, Ivy betrayed Joker and swore to go after him once Batman was killed. Joker assured her that he would be prepared for her with an army of Titan monsters, saying the she could "bring the wine" and he would "make the salad". Batman managed to defeat Ivy in the gardens. With all of the enemies on Joker's 'party list' defeated, Joker had his men set off several fire works directing Batman, the 'guest of honor', to the 'party' at the Visitor Center by the Cell Block. Rather than fight Batman, upon his arrival and confirmation of being on the 'guest list', the goons acted friendly, cheered him and allowed him safe passage (an acheivement is available for attacking and defeating these goons).

Batman found a bomb planted by Joker in the visitor center and upon its explosion, discovered the Joker's lair, a throne room atop various plastic toys from which he had been broadcasting to the island. Joker was holding Scarface the puppet and taking out his frustration on him by having a fictional argument before throwing him away. He then berates Batman for ruining everything by "Turning Bane into roadkill, feeding Scarcrow to Croc, "slapping around" Harley Quinn (which is apparantly his hobby), and destroying his precious venom plants." The villain then dispatched two Titan fuelled security guards at Batman, who defeated them.

"You're ruining my big night! Months of planning down the crapper! I just wanted to bring down your grim facade and for once let you see the world as I see it, giggling in a corner and bleeding. But you've denied me even that. I have nothing to live for!"

- Joker to Batman, seeming to have lost

Joker then revealed that he had recaptured Gordon before he could escape back to Gotham. Firing a Titan-tipped dart at Gordon, Joker was overjoyed when Batman took the shot himself. However, he was angered when Batman resisted and fought off Joker's attempts to make him give in. Enraged that Batman would never allow him this final truimph, Joker shot himself with one of his Titan darts, claiming he had little more to live for. He quickly awoke and mutated into the most horrific Titan monster of all (possibly being his backup plan the whole time), while still retaining his intellectual faculties. He then directed the circling Gotham News helicopters and Jack Ryder to the rooftops of Arkham so that they could watch his final fight with Batman. Strapping Gordon to an electric chair above a makeshift fighting arena (making him the "referee"), the mutated Joker goaded Batman to give into his injection, as it was the only way they could be on even fighting terms. Batman refused and used the only antidote injection on himself, which the Joker found hysterical. The two, with assistance from Joker's henchmen, then fought a brutal battle, with Batman knocking Joker into the electrical generator used to torture Gordon.

"Greeting's Gotham, Joker here. Arkham is mine. Soon I'll unleash madness untold onto the streets of Gotham. But first, direct your eyes to the rooftops and witness the final destruction of your dear Dark Knight!"

- The Joker in a message to Gotham City

The Joker got up from the attack and said he could take anything Batman threw at him, and asked if the Dark Knight was ready for the next round. Spraying Explosive Gel onto his glove, Batman declared that he would never let Joker win and would always be prepared for his tactics. Enraged, Joker prepared to kill his relentless nemesis as Batman charged him. The gel on Batman's fist then detonated as he struck his opponent, finally incapitating the most dangerous Titan subject of them all.

Following the Joker's defeat, the GCPD then retook control of Arkham Island, recapturing the escaped inmates and watching over the Titan-powered henchmen as they returned to normal. Joker's transformation back to his normal self was quite painful compared to others, culminating with the severe injuries he received in his battle with Batman. He was taken to his cell by several police officers and surviving Arkham security personnel, his plans having ultimately failed.

Joker's attack on the Asylum would leave close to two-hundred individuals dead and would serve as one of the major reasons why the "Arkham City" project was approved by City Hall.

After Arkham
Over the following months after Joker's and Batman's showdown on top of Arkham, Joker immediately notices that his body was not healing well at all after his brutal fight with Batman. After the asylum doctors diagnose Joker's condition at his request, they reveal that the chemicals from the Titan dose that Joker took were so large in quantity and taken at such a fast rate at once that large portions of the formula did not leave his body even after his regression, but became assimilated into his blood particles, making it impossible to isolate completely from his body and poisoning his blood stream. This causes Joker to develop a fatal and incurable illness that soon begins to ravage his face and body and gives the villain an estimated eighteen months left to live before Titan poisons his blood stream completely. Several surviving Arkham guards however have vowed on the graves of their friends that were murdered by Joker that he will meet a much more painful demise.

Realizing that this illness will make him appear weak in front of his allies and adversaries, Joker knows he needs to make new plans to ensure that his enemies do not know of his weakness, especially with Arkham City nearly complete. To keep a low profile from the other super-criminals, Joker uses a spoon to dig out the eyes of another inmate during lunch time, knowing that this would give him solitary confinement and allow him the peace and quiet he needed to make his plans. While imprisoned, Joker escapes from his cell and wanders around the patient belongings room and starts becoming attached to the dummy Scarface, who he found in a locker along with Riddler's and Two-Face's suits. Having used the puppet previously during the Arkham riots, Joker uses it to keep himself entertained and focused on his plans to ensure that his mind does not break completely from months of isolation.

Six months within solitary, Joker finally completes his plans and devises the perfect means to stay one step ahead of Batman and everyone else in Arkham City. However, Joker's sickness has taken quite a toll on him by this time and needed to be seated in a wheelchair to be moved around. Joker knows that he couldn't be transferred to Arkham City or else all his enemies would know of his sickness and weakness and planned to sneak into the city instead; all he needs now is an escape plan and on the night of his transfer to Arkham City, Harley Quinn would provide him with one.

Joker is eventually scheduled to be the first inmate of the recently completed Arkham City, but instead of being brought to the transfer buses to take him there, his escort guard has other plans in mind; plans of vengeance. Joker is brought to a medical lab so that the guards can exact their torturous revenge slowly in retaliation for the deaths of all their friends caused by Joker's plans in the Arkham riots. Unfortunately for them, the ever loyal Harley overheard their conspiracy, escaped confinement, murdered a female guard, took her place, brutally murders the rest of the guards, and finally rescues the Joker and brings him to her prepared escape boat. Joker and Harley escape the island, leaving Scarface behind, but are intercepted by Batman who was immediately alerted of their escape by his newly installed sensors on Arkham Island. Batman manages to destroy the psychotic couple's boat, but Joker and Harley are able to escape amongst the wreckage and proceeded to sneak into Arkham City using the sewer system network that connects to the Gotham Bay.

Being the first inmate in the city undetected, Joker plots to become the ruling elite in the Arkham City underworld and establishes his main base of operations in the Sionis Steel Mill, one of Black Mask's former company properties. Over the next several months, Joker begins renovating the factory into his classical image, complete with a roller-coaster death trap meant as a sadistic recruiting method to weed out the inmates with the best reflexes (those that jump from the coaster before the death plunge). With Harley at his side, Joker begins to brutally recruit inmates once again for his new army, both old and new associates alike, and soon becomes one of the leading powers of Arkham City, rivaling that of The Penguin and his gang. With Harley nursing him, Joker would soon gain some of his health back and would be well enough to walk without the use of a wheelchair, allowing him to embark on some of his plans himself.

Having firmly situated himself in the city, Joker begins to look to form several connections and partnerships to aid in his plans. He starts by paying a visit to Mr. Cobblepot, a.k.a, The Penguin, who was also one of the first inmates in the prison as he refused to move when the perimeter wall was built, believing that their bitter rivalry that started years ago was ancient history. However, Penguin still remembers all the trouble Joker caused him over the years and refuses to even let him enter the Iceberg Lounge, shutting the door just before Joker squirts acid towards his face. With Penguin now back on his hit list, Joker makes it one of his goals to topple Penguin's power in Arkham City and slaughter him and his entire army. With both Joker and Penguin the first inmates in Arkham, they are seen as the major power-bases by other inmates to join in order to survive in the hellish domain.

As Joker continues to build up his forces, a new Arkham inmate, Lester Kurtz, arrives looking for a job and easily escapes the Joker's death traps and dispatches his goons. Joker, impressed, takes a liking to Lester and welcomes him into his gang, but also instructs his men to keep a close eye on him. Realizing that the Joker is a poor choice of employer Lester bails out on the gang and goes looking for a job with Penguin. Joker is unsurprisingly furious to the point that he puts a bounty on Lester's head unaware of the fact that he's actually the latest alias of his hated enemy Batman.

Joker and his gang soon become embroiled in violent turf wars for control over Arkham City with other fractions and gangs. In order to ensure that no one could either confirm nor deny the rumor of his illness, Joker relays his orders through Harley while he remains in the shadows, cooking up plans and operations in preparation of Batman's inevitable arrival in Arkham City. Joker also uses Harley to lead some of his men into making frequent raids on other inmate's supply of drugs in order to aid in his condition. In addition to this, it seems that Joker has also been taking every precaution to prolong his fate, including abducting his doctor and forcing him to give him a diagnosis and isolate some of the Titan compound from his blood stream. The doctor, after informing Joker of his deteriorating condition and giving him the isolated Titan formula, is sent into the factory's old incinerator on Joker's roller-coaster.

Joker uses the isolated Titan to mass produce large quantities of the chemicals once again and upgrade some of his gang, sending them out to kill anyone he sees as an obstacle in his plans for control over Arkham City. Among them was Bane, who has been running a makeshift fighting ring in Arkham City, and is soon attacked by one of Joker's men, who is pumped up on Titan. Bane is defeated and nearly killed until Joker's thug's heart goes into cardiac arrest from the overuse of Titan and is mercy killed by Bane, who decides to locate and claim all the sources of Titan for himself once and for all, knowing just how dangerous it is, especially if used against him.

While Joker continues to be embroiled in the turf wars for control of the prison complex, Mugsy, an old time associate of the Ventriloquist, brings Scarface back to Joker as a favor to get back into Joker's gang, who is delighted to get his buddy back. Joker starts spending more time with Scarface than anyone else, making Harley jealous. Harley tosses Scarface into a boiler when Joker was not around, consoling Joker by saying that she slipped, but he tells her not to worry and brings out a new Scarface that Mugsy made for him. While Joker hugs the dummy, it motions to his eyes with his fingers to Harley, implying that it's watching her and hinting that Joker may be intentionally using Scareface to mess with Harley's love for him for his own amusement and to make Harley more vicious and erratic in leading his plans and operations. Scareface is also the perfect means of abuse that Joker needs, with Mugsy creating a new one every time Joker gets bored with one, freeing him to mutilate, torture, and destroy any puppet that failed to entertain him.

With multiple unseen connections and pawns in place, Joker is prepared to launch his latest plans for the death and destruction of all of Gotham City and beyond. With his pending illness, Joker takes precautions to ensure that he is still seen as one of the leading powers in Arkham City and eventually conquer the new compound for himself. With his plaything of a manipulation, Harley Quinn, Joker issues orders that would eventually come to fruition to reveal a heinous plan that would be unleashed in Arkham City and violently erupt onto the unsuspecting citizens of Gotham City. None know of the full extent of the Joker's plans, not even Hugo Strange himself, who assumes he has everyone in Arkham City under his control. Joker's plans would not only light up all of Gotham City with death and destruction, but would give him everything he has desired for the past year; power, revenge against Batman, a cure for his illness, incredible and unlimited numbers to command, and even immortality itself to continue wreaking death, chaos, and destruction for decades with no end in sight.

Batman: Arkham City
"Oh, Bats! If you only knew what I had planned! You'd just die!"

- The Joker to Batman

With Joker regarded as one of the most violent and historic criminals of all time, it wasn't long before Hugo Strange has him brought into his office in order to study and understand him, seeing Joker as the ultimate challenge for his psychological tactics. After having Joker brought in to start taped interview sessions, Hugo Strange reminds the Clown Prince of Crime that his remaining time left before his impending death is short, something even Joker admitted. Strange then offered to make a deal with the villain; if Joker allowed the doctor to study him, Strange would make Joker's last days more 'comfortable' in return, starting their alliance.

Throughout his alliance with Strange, Joker has the mad doctor round up dozens of medical doctors and physicians for him to help cure his illness. Regardless of how many doctors Strange abducts and brings into Arkham City, Joker seems more concerned and happy with torturing, mutilating, and murdering them rather than developing a cure. Unknown to Strange however, Joker has been using the doctors to drain large quantities of his poisoned blood and ship it off to emergency rooms all over Gotham City, infecting thousands of people with his illness. In return, Joker would tell Strange what it is that drove him over the edge of sanity, though all the stories he tells are nothing more than mere fabrications to hide the truth about his condition, which Strange later concludes after reading a dozen different origin stories Joker has told over the years.

While Strange believed he knew everything the Joker could be planning, the Clown Prince of Crime shocked him when he revealed that he knew everything about Strange, including his experiments, his control over Quincy Sharp, and his insidious plans for Arkham City, threatening Strange that he would have all this information leaked to the authorities and public if he doesn't stop trying to uncover his past. Using his knowledge of this information further to blackmail Strange, Joker was able to obtain weapons from him (though Strange had his own designs for this course of action) and gain inside information on the occurrences within Arkham City.

Joker eventually finds out that Strange had Mr. Freeze brought into Arkham City and is having him prepare countless medical drugs, chemicals, and serums for his plans by holding his wife, Nora Fries, hostage. Wanting Freeze's genius for himself to develop a cure, Joker has Strange bring Nora to him to use as collateral to make Freeze develop a cure. Leaving Nora in one of his warehouses and at the mercy of his henchmen, many of whom wish to unfreeze and rape her, Joker blackmailed Freeze to develop a cure, threatening to murder Nora if he fails to do so, though Joker planned to kill her regardless if Freeze succeeded or not. However, Strange, fearing Joker's potential to ruin his plans, forms a pack with Penguin and helps him capture Freeze, lock him up in his Museum, and gain control of his weapons. Strange would still remain in contact with Joker, who was initially unaware of this betrayal, and continue to supply him with weapons as part of his plans to initiate Protocol 10, a military operation that Strange believes will make him famous and serve as a monument to Batman's failure and defeat.

By the time Arkham City officially opens, Joker has turned the Sionis Steel Mill into a complete slaughter house, having murdered hundreds, including other inmates, political prisoners, and doctors alike, within the torturous confines of the mill. Having built up a huge army of over a thousand men, a large portion of the city under his complete control, and even creating vast amounts of the Titan chemicals to serve as an asset to his army, Joker was easily one of the most powerful figures in Arkham City, though Penguin was a worthy rival and Two-Face was on the move to becoming a major powerhouse as well.

Each and every day, the war for control over Arkham City would escalate and become more chaotic and violent as Joker relished in the mass amounts of chaos, destruction, torture, murder, and mutilation he brought to the streets. In love with the very madness he creates, Joker is not concerned in the slightest about his opponents in the turf wars as he has already begun to lay the foundations of his megalomaniac plans and implement his numerous trump cards that only he and a select few know about. Before long, Joker would obtain everything he needed to conquer Arkham City and find the means to obtain complete power and control to destroy Gotham.

By the time Bruce Wayne is abducted and brought into Arkham City under Hugo Strange's orders, Joker's crew have seized control of the Arkham City Medical Facility, built inside the Gotham Cathedral, and have captured all the medical staff in order to claim all the chemicals and drugs for themselves. With Harley leading the operation, Joker's thugs also abduct a doctor, Stacy Baker, who previously diagnosed Joker, under his orders to bring her to him for an update on his condition. Knowing that Two-Face is stationed in the Solomon Wayne Courthouse near the cathedral, planning to execute Catwoman to showcase his might, Joker also intends to ambush the operation to spoil Two-Face's plans, kill Catwoman himself, and grab Batman's attention. As Batman infiltrates the courthouse, defeats Two-Face's men, rescues Catwoman, and strings Two-Face upside down over a pit of acid, Joker sees his opportunity to implement a surprise attack. Using a remote controlled sniper rifle that Harley set up in the cathedral tower, Joker attempts to assassinate Catwoman, though his primary motive was simply to coax Batman into tracking him down as part of an elaborate trap.

"Twinkle, twinkle, little bat. Watch me kill your favorite cat."

- The Joker as he attempts to kill Catwoman

Batman pulls Catwoman out of the way of the sniper bullet and infiltrates the Cathedral, where he encounters Harley Quinn and a handful of Joker's followers. Batman is unable to apprehend Harley without Joker's men hurting anyone and is forced to let her escape in an ice cream truck parked outside with Stacy in tow. Despite this, Batman eventually subdues all of Joker's men, rescues the medical staff, and ascends into the bell tower, where the location of the sniper rifle's bullet was triangulated to by Batman's detective skills and forensics. Once there however, Batman finds no sign of Joker aside from televisions broadcasting the crazed villain, and dozens of explosives and flammable chemicals rigged to blow. Batman escapes just in time as the bell tower is engulfed in the resulting explosion as Joker's trademark laughter echoes through the tower. However, Batman was able to scan the sniper's rifle control settings before the tower's destruction and was able to set up a signal tracker, which would lead him to Joker.

Using the signal tracker, Batman is able to locate Joker in the Sionis Steel Mill. Once there, Batman learns that Joker has rallied dozens of his followers to watch Stacy's slow and painful demise, feeling bitter towards her for not being more helpful in developing a cure for his condition. As Joker's men prepare to murder her, Joker knows that Batman would soon arrive and needs a diversion to keep the hero occupied while he perfects the next phase of his plans and his trap for Batman. He then hands down the order to take Stacy to the smelting chamber to slowly torture her while he discusses his schemes with Harley. At the same time, Joker also begins sending groups of his men to find Mr. Freeze, who mysteriously disappeared, and to also enter Two-Face's territory and attack Dent's men in order to take advantage of his dwindling numbers. After making his way into the Smelting Chamber, Batman rescues Stacy, defeats all of Joker's bodyguards, and finally enters the office of the Clown Prince of Crime himself. When he enters the office, Batman finds Harley crying over a seemingly lifeless Joker in a wheelchair. However, this is all part of Joker's plans as he fakes his own death in order to divert Batman's attention, allowing the hero to become vulnerable to a surprise attack. "Surprise! You fell for the old fake Joker gag, Batman!"

- The Joker to Batman



Batman is soon gassed by Clayface from behind and then beaten into unconsciousness by Harley with a bat, at which point Joker firmly ties Batman to a wheel chair, tapes a phone to his chest, and sticks a syringe in his throat to transfer his poisoned blood into Batman's body.

"It was all a lie. There's nothing wrong with you." "Nice of you to say. But you of all people should know there's plenty wrong with me. Take my blood for example. I wish somebody would. This stuff is killing me!"

- Batman and Joker's first words to each other in Arkham City

With Batman now infected with the same disease as Joker, Joker insists that Batman follow his commands in order to get a cure for the disease from Mr. Freeze. Though Batman is willing to die if that means the end of the Joker, the villain reveals one of his trump cards; thousands of innocent people in Gotham are also infected with his blood.

Revealing that poisoning Gotham City is a separate plot from Protocol 10, Joker rolls the wheelchair outside the window, telling the Dark Knight that he will keep in touch with the phone he taped to him. However, Joker plans to not only use Batman to obtain the cure but also use him as his greatest asset in the turf wars in Arkham City in order to defeat his rivals. Batman, realizing he has no choice but to find the cure to save Gotham once again, allows Joker to send him on several missions to obtain the cure. Meanwhile, a portion of Joker's crew have split up into two groups with one killing Penguin's crew outside the old GCPD building, where Freeze was previously stationed, and one moving into Two-Face's territory and massacring all of Dent's crew and rounding up any stragglers for information on where Freeze is currently.

Keeping in contact with his longtime enemy through a phone SD card, Joker eventually sends Batman to rescue Mr. Freeze from Penguin, knowing that this will also topple Cobblepot's power in Arkham City and eliminate a major opponent in his control for Arkham City. Once Batman defeats Penguin's forces, saves Mr. Freeze, and puts Penguin out of commission, Joker immediately takes advantage of this new tide in the battle and has his men slaughter hundreds of Penguin's men and press gang any survivors into joining him. Using the sewers systems and tunnels that Joker's crew had made over the previous months, Joker's followers infiltrate Penguin's territory and begin claiming it for themselves.

At the same time, Joker sends his men to retrieve the last shipment of weapons from Hugo Strange under the foundations of Wonder Tower, Hugo Strange's base of operations, which would contain the most devastating weaponry including missile launchers, sniper rifles, rocket launchers, automated assault rifles, mines, high frequency power generators, thermal trackers, and much more. With his increased firepower, Joker takes Arkham City by storm, conquering nearly the entire compound and leaving a trail of death and destruction in his wake. Almost every prisoner within Arkham City would be forced to join Joker's army, making Joker the ruling elite on the streets while Two-Face's men were being rounded up and tortured for information in the Steel Mill. However, Joker was still in desperate need of the cure and feared that perhaps Batman has actually failed or turned on him as he has not heard from him in hours.

Taunting Batman through phone calls with dubious clues about what he is truly planning, Joker was relieved to learn Batman has found the means to develop the cure and has Freeze create enough for both of them. However, Freeze destroys one of vials of the cure and refuses to give Batman the remaining one, which he locked up in his safe, until he saves his wife from Joker. Batman, knowing how little time he has left, fights Freeze for the cure. Joker in the meantime, having planned to double-cross Batman the entire time, sends Harley to steal the cure (and to also murder several of his henchmen for failing to capture Freeze) while Batman and Mr. Freeze are fighting by cutting the wall open located behind the safe and pilfering the cure.

In place of the cure, Harley leaves two Joker cards, with one being a faxed version and the other being a physical card, which are actually clues to what Joker's plans truly consisted of, to taunt Batman. Joker also orders Harley to steal some of Freeze's offensive equipment in order to increase his weaponry after successfully obtaining the cure. With Harley on her way to deliver the cure, Arkham City under his complete control, his increased weaponry, and Protocol 10 just under an hour away from commencement, Joker begins making his plans to blow the walls of Arkham City and form escape routes to lay a bloody siege on Gotham City and completely destroy it and wipe out all it's citizens. As all supplies, ammunition, and weapons are prepared and stored away for transportation, Joker motivates his army and prepares them for the massive attack on the city.

With Batman having accomplished everything he was blackmailed to do, Joker is delighted to begin his cat and mouse game with his old enemy and friend anew. To renew his game with Batman, Joker makes an anonymous phone call to the Gotham Tonight Show to inform the staff there that Batman was in Arkham City in order to lure news reporter, Vicki Vale, to the city. Once Vale was in the perimeters of the city in her news chopper, Joker takes over her broadcast to taunt her and then fires a rocket at her chopper, causing her to crash land in Arkham City. With Vale's chopper destroyed and her pilot dead, Joker sends some of his men to kill the helpless reporter with sniper rifles, knowing that this will force Batman out into the open and serve as a diversion while Harley returns to the Steel Mill with the completed cure. Batman neutralizes the threat and rescues Vale, at which point Joker contacts him again, telling him that if he wants the cure, it will be waiting for him in the Steel Mill. With all the pieces in place, Joker is prepared to start the next phase of his plans and obtain the main objective of his schemes; finding the Lazarus Pit, which was hidden somewhere under Arkham City, to obtain immortality and absolute power and assume control over the League of Assassins.

Batman eventually confronts Joker, who is staring into a mirror and appears perfectly healed, though his reflection curiously shows him still sick, at the top of the Steel Mill after rescuing Nora Fries from his henchmen and retrieving Freeze's stolen equipment. Eventually defeating Joker and dozens of his men, Batman is surprised when Tyger helicopters suddenly begin firing missiles at the Mill and all over Arkham City under Strange's orders, revealing that Protocol 10 is actually a security measure to wipe out the entire inmate population through missile attacks. TYGER continues raining down death and destruction onto the city, destroying the room and pinning Batman under the ruble. Joker, gleeful, prepares to carve a smile into his face when Talia al Ghul interrupts him, offering him immortality in return for Batman's life. When Batman warns Talia not to do so, Talia presents her sword to the Joker, who gladly accepts it and agrees to lead the league, planning on taking advantage of Talia's knowledge of the Lazarus Pit to finally locate it. Leaving Batman, hundreds of his own crew, and even Harley Quinn, at the mercy of Protocol 10, Joker is led to the very building that is directly located over the Lazarus Pit Chamber, the Monarch Theatre.

While it seems that Talia betrayed Batman, she truly intends to lure the Joker aside and kill him while Batman tracks her down using one his trackers that Talia equipped on her person. Batman however knows that Talia is the one in danger and, true to his prediction, Joker easily outsmarts and overpowers her at the Theatre, holding her hostage to insure that Batman arrives at the Theatre for their final performance. Joker finally prepares the last steps of his plans; setting up an arena for an incredible showdown with his old friend and eternal enemy. Turning the Monarch Theater into his own personnel arena, Joker rigs explosives all over the floors and walls, knowing that the key to immortality he so desperately craves was underneath his very feet. With Protocol 10 wiping out the rest of the competition, Joker counted on Batman to take down Strange and come to him for their final battle.

Once the rest of Gotham's super-criminals were killed off in Protocol 10 and Strange was taken down by Batman, Joker would be able to take complete control of the entire criminal underworld and lead the whole inmate population of thousands of bloodthirsty and sadistic mass murderers, serial killers, and rapists to blow the walls of the prison and erupt onto the streets of Gotham in an orgy of bloodletting. With the League of Assassins under his complete control, the powers of immortality at his disposal, the most technologically advanced military grade weaponry known to man in his possession, and the sheer amount of numbers in his forces to command, Joker relished at all the death and destruction he could bring to Gotham and the world.

After Batman stops Protocol 10, destroys Wonder Tower and neutralizes TYGER forces, and the deaths of Hugo Strange and Ra's al Ghul, the secret benefactor behind Strange's plans and operations, Joker has his men patrol the Arkham City streets and takes over the Arkham City monitor systems to challenge Batman to a final showdown. Batman soon arrives, subdues all of Joker's crew, and enters the very Theater where his life as a crime fighter began to take root. With Talia at gunpoint, Joker demands the cure from Batman, confusing the hero as he believed Joker already had it and cured himself. In the confusion, Talia grabs the sword she presented to Joker and runs him through with it, seemingly killing The Joker once and for all. As Talia reveals she stole the cure from Harley Quinn before she could deliver it to Joker, Batman looks at his hated enemy, believing that his death was an unnecessary casualty and tells Talia that there is always an alternative tactic to defeating an enemy. Talia defends her course of action to Batman by stating that it was a necessary one in order to save him and comforts the hero, assuring him that the long night of chaos and destruction instilled by the Joker, Hugo Strange, and her father, was finally over. "So, how do you keep a secret from the world's greatest detective? Well, do you know? It's easy, you stick it right under his long pointy nose...and wait."

- The Joker to Batman

However, realizing that it's never simple with the Joker, Batman begins to rethink all the strange occurrences throughout the night; a seemingly dead Joker dummy in a wheelchair, the two versions of the Joker card left in place of the cure, and a healthy Joker looking into a mirror that reflected a sickly Joker. Connecting them all together, Batman realizes the truth: there was always two Jokers. Surmising that since Joker never received his cure, Batman immediately concludes that the healed Joker was not the real one and turns to Talia just as he heard a gun cocking in the distance. Batman, screaming out to Talia in vain, is too late to warn her and watches in pain as she is shot fatally in the back. Falling into the arms of her beloved, Talia apologizes to Batman for her carelessness with her last breath and dies as the insane laughter of the one, true Joker reveals himself in front of the movie projector holding the gun he shot Talia with.



Still sick and nearing death, Joker aims his gun at Batman next, demanding for Batman to hand over "his cure". The healthy Joker reveals himself to be Clayface, having been smuggled into Arkham City under Joker's orders to take up the spotlight and divert attention from his true plans; Clayface agreed to assist Joker for the chance to play the role of a lifetime and then take on Batman's persona after killing him. Clayface grabs the cure before Batman can, absorbs it into his body, and starts an incredible battle with the Dark Knight, using all his abilities to the fullest of their potential. However, Batman is able to use freeze bombs that were made and given to him by Mr. Freeze to stop Clayface in his tracks. After Batman freeze's Clayface and cuts him into pieces with Talia's sword, the Joker, after making a tasteless joke about Talia al Ghul's death, detonates the bombs on the floor for a "change of scenery."

As the floor explodes, Batman and Clayface are violently thrown down into the Lazarus Chamber, where their brutal fight continues. Batman, still wielding Talia's sword, is able to freeze Clayface once again, enters his body, retrieves the cure, and cuts Clayface clean open, incapacitating the monster once and for all. Batman, having retrieved the cure finally, drinks it and cures himself of the Titan disease, also keeping half to cure Joker and the rest of Gotham. Joker, unshaken by Clayface's defeat, prepares to jump into the Lazarus Pit to claim immortality once and for all and become the new leader of the League of Assassins. However, much to Joker's dismay, Batman throws the sword into the main generator, causing it to falter and knocking what's left of Clayface into the Pit. The controls and remaining generators go critical as a result as Clayface's body matter contaminates the chemicals of the pit, resulting in an explosion that completely destroys the pit and most of the room.

"Do you want to know something funny? Even after everything you've done... I would've saved you." "That actually is... pretty funny!"

- Batman and The Joker's final words to each other

With his plans ultimately ruined, Joker demands his last hope from Batman, taunting him that despite all the death and destruction he caused in just a single night, Batman will still save him. Batman voices his hatred of the Joker and his temptation to refuse him the cure and let him die, knowing that he will only continue to break out and kill if left alive and locked up. Laughing at the absurdity of their never ending battle, Joker stabs Batman in the arm, causing him to drop the vial, which shatters onto the floor. Joker screams in horror as Batman throws him to the ground and tries in vain to drink the cure from the floor. Accepting that he will ultimately die, Joker asks Batman if he is happy now and calmly sits on the ground. As the Joker's health begins to reach its ultimate low, Batman reflects on the irony and humor in that Joker was actually correct; despite his crimes, Batman would have still saved him. The Joker agrees with Batman and also finds the situation genuinely funny, laughing and coughing soundly in his final moments before he finally succumbs to his Titan poisoning, dying with a smile on his face.



Pitying his long time nemesis, Batman grimly picks up and carries Joker's corpse out of the Monarch Theater; as the doors open, Joker's gang is outside chanting his name, expecting to see their leader triumphantly striding out and having defeated Batman once and for all. They all go completely silent when they see The Dark Knight carrying The Clown Prince of Crime motionless in his arms. Among the gang outside the theater is Harley Quinn, who gasps and falls to her knees, sobbing uncontrollably as she sees The Joker's limp body being carried away by Batman.

Batman finally carries Joker's corpse through the main gate of Arkham City and into Gotham City, where the GCPD have gathered in preparation to retake the area from the rampaging criminals. He places The Joker's body on the GCPD patrol car of Commissioner Gordon, who is also shocked to see Batman's greatest nemesis dead and repeatedly asks him what happened, only to be met with silence. After years of death, misery, and tragedy, The Joker, The Clown Prince of Crime, and Batman's greatest threat and arch-nemesis was gone at long last, though the impact of his death would undoubtedly affect thousands of people and many of his followers, especially Harley, will see to it that his legacy will continue to live on.

Gameplay
A special download for Arkham Asylum exclusive to the PlayStation 3 allows players to take control of the Joker. He has his own attacks and battle rooms in which he must fend off Arkham's security guards trying to apprehend him. During combat, Joker employs his lethal laughing gas, a revolver handgun, and his joy buzzer as special attacks. He uses his impressive hand-to-hand abilities to punch, slap, kick, and poke out eyes. During stealth missions where Joker must dispose of Arkham's security on patrol, he can use a pair of glasses with swirly circles in the lenses to see through walls and identify guards. Another weapon he has is remote-controlled chattering teeth that carry explosives. The Joker also fights specific characters from the regular game, including guards Aaron Cash, Henry Smith, Eddie Burlow, Zach Franklin, William North, and Louie Green, as well as Commissioner Gordon. The challenge maps are divided into melee and stealth challenges. The melee challenges pit Joker in an arena-like room to face off against a number of security guards who come in to face the Clown Prince of Crime in groups. The stealth challenges are when the Joker must defeat all the Arkham guards without being detected in a large area of Arkham Asylum complete with nooks and crannies for the Joker to hide in.

The Joker's Melee Challenge Maps:
Maximum Punishment


 * Round 1 - The Joker must face Henry Smith and two other Arkham security guards attired in riot gear at the Holding Cells.
 * Round 2 - The Joker must face Eddie Burlow and four other security guards. (One of which is notably the guard the Joker killed to make his escape at the start of the regular game.)
 * Round 3 - The Joker must face Aaron Cash, Louie Green, and six other security guards.
 * Round 4 - The Joker must face a team of security guards led personally by Commissioner Gordon, including Zach Franklin and William North.

Gutter Tactics


 * Round 1 - The Joker must face Zach Franklin, William North, and a team of four other Arkham security guards on patrol in the Old Sewer.
 * Round 2 - The Joker must face Louie Green and a group of helmeted security guards led by Eddie Burlow.
 * Round 3 - The Joker must face Aaron Cash, Henry Smith, and a total of nine other security guards attempting to take him into custody.
 * Round 4 - The Joker must take down Commissioner Gordon and an army of fifteen Arkham security guards trying to apprehend him.

Caged Fighter


 * Round 1 - The Joker must contend with William North, Louie Green, and two other security guards in the Extreme Incarceration area of the Penitentiary. He has 28 seconds before the Arkham security systems electrify the floor and shock him into unconsciousness.
 * Round 2 - The Joker must face a team of four security guards led by Eddie Burlow. Burlow and one of the security guards wield electrified stun batons and can block most of the Joker's attacks. The Joker has 38 seconds before the floor electrifies.
 * Round 3 - The Joker must face a group of six security guards led by Aaron Cash and Henry Smith. As before, two of the security guards are armed with stun batons. The Joker must defeat them all within a 48 second limit before the floor electrifies. As the fight intensifies, at least one of the guards (most likely Smith or Cash) will climb onto another part of the floor to open the emergency riot gun locker stored there.
 * Round 4 - The Joker must face Commissioner Gordon, Zach Franklin, Louie Green, and a team of five security guards. Gordon and one of the security guards carry stun batons. They must all be eliminated before 58 seconds are up. As soon as one opponent loses a stun baton, another will instantly bend over to retrieve it, making this last combat challenge one of the hardest of all.

Giggles in the Gardens


 * Round 1 - The Joker must face five security guards tasked with guarding the Titan Production Facility in the Botanical Gardens. (One of which is notably the guard the Joker killed to make his escape at the start of the regular game.)
 * Round 2 - The Joker must contend with a team of eight security guards in riot gear sent to capture him, including Henry Smith and Eddie Burlow. One of the guards is armed with a stun baton. If the fight is prolonged one of the guards (most likely Burlow or Smith) will go for a riot gun locker or take a cement block off the wall to hurl it at the Joker.
 * Round 3 - The Joker faces Aaron Cash, who leads Louie Green and six other Arkham guards in an attempt to apprehend him.
 * Round 4 - Commissioner Gordon, Zach Franklin, William North, and seven other security guards make this last desperate attempt to apprehend the Joker in the Titan Production Facility. One of the security guards carries a stun baton. Most of the Joker's opponents in this last combat challenge will try making use of anything they can get their hands on to use as a weapon. At least three enemies will attempt to retrieve a shotgun from the gun locker (Most likely Gordon, Franklin, or North). As soon as one opponent loses a stun baton, another will likely retrieve it.

The Joker's Stealth Challenge Maps
Paging Doctor Joker


 * The Joker has to take down all the security guards in the Sanatorium to escape Arkham Asylum. There are five security guards led by Zach Franklin and Henry Smith, and all are armed with riot guns. Aaron Cash is monitering the Arkham guards. He will alert them if he notices one goes missing. The Sanatorium consists of three levels: a lower level (mainly cells) with a ramp leading to the second level (mainly offices), and a third level catwalk over the second level.

Administered Pain


 * The Joker must take out all the security guards in the Arkham Mansion's Records Room to escape the asylum. There are four security guards led by Henry Smith and William North, and all are armed with riot guns. The Records Room is a large area that is divided down to sides of the room by enormous records cabinets. There is a catwalk on both sides of the room.

Hell's Hacienda


 * The Joker must take out all the Arkham security guards in the Intensive Treatment Lobby to escape the asylum. There are four security guards led by Eddie Burlow and Louie Green, and all are armed with riot guns. The Intensive Treatment Lobby consists of a complex maze of tunnels and walkways with many good hiding places the Joker can make use of.

Cavern of Love


 * The Joker must take out all the security guards in the Pump Station to escape the asylum. There are seven Arkham guards led by Zach Franklin, and all are armed with riot guns. The Pump Station consists of a basement, a control office, and a main floor. There are numerous walkways and safe hiding places for the Joker to hole up in. It also has several structurally weakened surfaces on floors and walls, giving the Joker an option of blowing the floor out from under a passing guard.



Some of the Takedowns utilized by the Joker

 * The Joker lunges onto his foe, clinging to their backs and pounding them in the head relentlessly until they go limp, before finishing off with a stylish spinning slap.
 * The Joker stops and waves at an opponent, distracting them just enough to catch them off guard with a slap across the face. He proceeds to seize their outstretched hand and pulls a classic Joy Buzzer gag, electrocuting them.
 * The Joker rushes forward and slaps an Arkham guard upside his face, knocking off his visored helmet. He then finishes with a deadly precise eye poke attack, putting them out on the spot.
 * During a high combo, the Joker may seize a stun baton from a security guard, strike the guard across the face with it, and then brutally shock them in the stomach as they go down.
 * Joker comes up behind his foe and kicks them from behind in the groin, causing them to collapse in pain.
 * Joker leaps knee-first onto a downed Arkham Guard before finishing the guard with a downwards punch.
 * Joker uses the flower on his lapel to spray his foe with his trademark Joker Venom.

Psychological profile (by Dr. Young)
My most challenging patient at Arkham. The Joker's derangement defies easy classification. His rapidly changing mood swings hint at borderline personality disorder, but he has no trace of associated identity problems. He also displays signs of deep narcissism, but nonetheless he has a well-developed sense of others, as his ability to manipulate everyone from orderlies to doctors in Arkham is extraordinarily well-developed; he also shows all the signs of a highly functioning sufferer of antisocial personality. At times I actually wonder if he is actually insane at all.

Additional notes

His criminal record makes clear that he is a unrepentant homicidal maniac.

He is extremly manipulative; the file detailing Harley Quinn's associations with him is fascinating reading. It's unfortunate I was not on staff at the time to witness his seduction of her firsthand.

His past is unknown, and his answers to me about it are wildly inconsistent and frequently fantastical.

MR. WHITE?

Arkham City Profile: Dr. Hugo Strange
???

Joker

This self-styled criminal clown remains as volatile and violent as ever. His showdown with Batman in Arkham Asylum has left him humiliated, angry and thirsty for revenge. Some form of disease is spreading over the Joker, ravaging his face and body. He has repeatedly refused to be treated by anyone except his special 'nurse' Harley Quinn.

Dr. Hugo Strange: Side Note

The Joker came to Arkham City laughing himself silly -- what's so funny about this place?

~ Dr. Hugo Strange

Arkham Island

 * "Hello. I'm Warden Idiot. Just let me welcome you to your new home. Here in Idiot Asylum, we have just one rule. You'll never leave us."
 * "I'm just sitting here watching cartoons. If any of you fine Blackgate rejects is bored, come over and see me. Don't look up when you open the door. It'll spoil the surprise, and my experiment."
 * "I seem to be losing men like there's a plague in town. I guess the bat is back. I've got a couple of men in the guard towers covering your movements, but be careful. They're both loose cannons with itchy trigger fingers and, well, you know, accidents do happen."
 * "Ding dong. Warden Joker would like to announce that as of today, all Arkham guards have been fired due to budget cuts."
 * "Any available psychos, killers, maimers and murderers that are not yet in the Old Mansion, hurry up, you fools, before I feed you to the bat himself!"
 * "Please remember to take good care of all our hostages. They're no good to us dead. However, a bruise here or a cut there won't go amiss."
 * "Please remember to keep an eye open for any flying rodents during your duties. I hear the Asylum suffers from infestations from time to time."
 * "Ding d-ding, dong! Joker here! Here's what's new in the asylum... Some idiot is running around the asylum, dressed like a bat...! I know! Crazy! He should be considered costumed and dangerous."
 * "Anyone seen the Big Bad Bat? I warn you, he may look like an idiot and talk like an idiot, but don't let that fool you. He really is an idiot." 
 * "Paging Dr. Howard. Dr. Fine Dr. Howard."

Medical

 * "Paging Doctor Bat, paging Doctor Bat. Is there a Doctor Bat in the room?"
 * "Hello? Is there a doctor in the house? No? Pity. I seem to have a pile of wounded henchmen that need medical attenion."
 * "It's true! You really are the world's greatest detective. How did you do that, Bats?"
 * "See if he can detect being punched in the face."
 * "Tell me Bats. What are you really scared of? Failing to save this cesspool of a city? Not finding the Commissioner in time? Me, in a thong?"

Caves

 * "Get a move on! I'm not joking. I want it done now!"
 * "Something funny? I take it you've done what I told you to do."
 * "I hope so. 'Cause if you're lying to me, I'll have your eyes and fingers. You understand?"
 * "Hellooooooooooooooooo! Can you hear me? For the love of... I supose that's you in there, Bats. Well, enjoy it while you can. These caves will be your tomb."
 * "He's down there with you. Making you all look like fools."
 * "He's making you look stupid. Which admittedly isn't that hard to do, but it is not why I put you down there."
 * "I said I wanted the Bat stopped. Did no one listen? It's like you don't want an outbreak of Titan enhanced mutant babies climbing over Gotham."
 * "You do not listen to me. I said stop him but you let him through. Try harder! Or I'll... I'll... I'll hurt you. Badly."

Predator (KO'd henchman)

 * "Don't worry boys, if Batman actually makes it as far as medical, you won't be hurt. Well.... you may, but smile, your just seconds away from medical care!" (Silent Knight)
 * "BABOOM! Another one bites the dust."
 * "He's taken one of you out. And not in the nice first date kind of way."
 * "I'm sure there used to be more of you down there."
 * "Oh, is someone missing? I keep losing count."
 * "Have you checked the time sheets? I'm sure there were more of you at the beginning of the day."
 * "Looks like one of you waited too long for the elevator to arrive." (Medical)
 * "Are you blind? Look down on the ground. There's something down there and I don't like it." (Ground)
 * "Have you even thought about a visit to the examination rooms? You never know what you'll find, might even be terminal." (Medical)
 * "Are you even looking for him. Try the examination rooms? You know the little rooms. Jeez, it's not surprising you're all dropping like flies." (Medical)
 * "You may want to go west, and check out the walkway. While you're there keep going." (Survival Tactics)
 * "You guys may want to have a look on the walkways. I think someone's left you a gift." (Medical)
 * "Gotta a little story for you. It seems that tough hard-as-nails Blackgate murderer has been taken out and left in the middle of freakin' room. Any of you actually see it happen? Idiots!" (Record Breaker)
 * "Now do any of you think it's OK to be hanging about doing nothing? No! Then why is one of you doing it now?" (Predator)
 * "You may wanna pop down and check the scanner tunnel. You may find something you weren't expecting." (Survival Tactics)

Predator (Progress of henchmen)

 * "He's taken out two of you. Find him."
 * "Three down. You're running out of people."
 * "Four down. Not funny. I don't pay you for these kind of results. Find him or I'll find you."
 * "It's five down to Batman. I'm losing my patience. Where is he? Is he above you?"
 * "Looks like it's four against one. Not bad. I advise keeping it that way."
 * "Three against one. Feeling lucky?"
 * "It's just the two of you now. Bet you're wondering which one of you is gonna be next. I know I am."
 * "Well, it just looks like it's you and the Bat. Gotta say, I'm a little disappointed."
 * "He's right behind you! Oops. Only Joking."
 * "You can do it, buddy! Well, let me put it this way. You better do it."
 * "He doesn't stand a chance. Oh, you guys are the best! Well, the best I could find on such short notice."
 * "Five against one. Good odds."

Arkham Asylum

 * Hey! Someone help Bat-baby up off the floor!
 * Oh, I'd like to thank my fans for their undying support, and the people of Gotham, who I'll be seeing very, very soon.
 * Gotta say, I thought you'd last longer.
 * I salute my fallen enemy! (Blows a raspberry)
 * That loser didn't stand a chance! I mean LOOK AT ME!
 * Ohh, isn't that cute? Little Bats' asleepin. Someone finish him off.
 * Too easy! Played you like a violin then cut your strings! Nighty-night, Bats.

As Titan Joker

 * One down, who's next to party with me?
 * Who else wants to get crazy?
 * Tonight, Gotham, I have defeated your dear Dark Knight. Don't be sad. You're next!

Arkham City
thumb|300px|right|Joker's game-over screens.
 * "I figured you'd have a little more fight in you. Guess I figured wrong!"
 * "Oh, Bats! I really figured you'd last longer than that!"
 * "It's okay to die, Bats. I'll be here to protect Gotham. I'll do a real good job!"

Clayface Joker

 * "Get up, Bats! Hey, you ain't looking so good!"
 * "Oh, Bats! If you only knew what I have planned! You'd just die!"
 * "Aren't you supposed to be up on your feet and trying to stop me?"

Arkham Asylum

 * If you keep constantly visting the Vistor Center, you meet Joker's head in the TV. He'll talk to Batman as if Batman was visiting for a psychologal therapy appointment. see here
 * When visiting the Vistor Center, after the Joker's head in the TV finished talking to you, turn the camera around and after a few seconds turn it back and notice how the Joker "mannequinn"'s arms change postions.
 * In Dr. Young's notes, Joker may have looked at it, but he only put his signature around himself only, not even Harley. Yet, there is a Joker smile on the Tweedledee and Tweedledum page, where regularly the Tweeds hire themselves out to Joker, most of the time.
 * Of all the minor tweaks to his appearance, the Joker has been given a make-up based glasgow smile to make it look like he's always smiling. This was most likely inspired by Heath Ledger's portrayal of the Joker in The Dark Knight.
 * Unlike the other inmates, Joker doesn't appear to have an identifiable or decorated cell in Arkham Asylum. The only cell that could possibly be his is one found in the penitentiary, because on the wall someone has written "Welcome to my humble abode". Alternatively, he could be kept in the "Extreme Isolation" area of the Asylum, which is the one place that the player can not explore.
 * Unlike other henchmen infected with the Titan serum Joker keeps his mental state and can speak, as opposed to simply roaring.

Arkham City

 * In an alternate ending that plays if Catwoman decides not to save Batman, a disturbing and panicked radio frequency will be broadcast by Oracle. She will plead for anyone who can hear her to send help as Joker and his forces have completely destroyed Gotham and murdered nearly everyone, including Batman and her father, Commissioner Gordon, ending by stating that Joker has won.
 * In this canon, Joker has a much more heated rivalry with The Penguin, stemming from a night when Joker murdered one of his waitresses at the Iceberg Lounge by melting her face with his acid for spilling wine on him. This caused massive, negative publicity for the Penguin's club and Penguin forbade Joker to ever return, kicking him out when Joker returned weeks later after shooting the doorman.
 * Joker appears to be wearing a new darker, grimmer suit than the one he wore in Batman: Arkham Asylum. While Clayface poses as a healthy Joker he is wearing a suit identical to the original from Arkham Asylum, except with the flower on the opposite side of his chest.
 * During the "Ghost Train" level, if the player switches to Detective Mode upon reaching the Joker his body will not show a skeleton, hinting that it is Clayface in disguise.
 * In his patient interviews, Joker recounts his origin from Batman: The Killing Joke and even uses several lines from the critically acclaimed comic.
 * During the credits, a voice mail received three hours ago by the Joker plays in which he sings Only You (And You Alone).
 * On the floor in Joker's office in the Steel Mill is a positive pregnancy test, hinting that Harley may be pregnant with the Joker's child.
 * At the Spike Video Game Awards, the Joker won the "Character of the Year" award, along with Mark Hamill being nominated for the "Best Performance by a Human Male" award for his performance as the Joker.

Gallery

 * The Joker (Batman: Arkham Asylum)/Gallery
 * The Joker (Batman: Arkham City)/Gallery

Video Gallery
Video:Batman: Arkham Asylum - Patient Interview Tapes of The Joker|The Joker's patient interview tapes. Video:Batman Arkham City - Secret Joker Audio Tape|Hugo Strange interviews The Joker Video:Batman: Arkham Asylum - Joker's Game Over lines|The Joker's game-over screens Video:Joker Tapes|Joker Tapes Video:Joker Calls|Joker Calls