The Joker attacks Gotham City's Mayor's office but is foiled by Batman, who escorts him to Arkham Asylum. Due to a recent fire at Gotham City's Blackgate Prison, many members of the Joker's gang have been temporarily relocated to Arkham. As Batman accompanies the guards taking the Joker inside, the asylum's security is overridden by Harley Quinn, allowing the Joker to escape and take control of the facility. Batman quickly realizes that these events have been part of the Joker's plan and that the Joker had bribed a security guard to help him escape and kidnap Commissioner Gordon. The Joker threatens to detonate bombs scattered around Gotham City should anyone attempt to enter Arkham, forcing Batman to work alone; however, he is able to rely on Oracle who helps guide him through the asylum over the radio.JOKER is able to gain access to a garden he found on the island.
After being rescued from Harley Quinn, reveals to joker the location of Bane, who has been experimented on by Dr. Penelope Young, one of the Asylum's doctors. Following a fight with Bane, joker learns that his old henchmen is seeking a chemical called Titan created by Dr. Young that is being produced at the asylum. The compound is based on the Venom drug that gives Bane his super strength, though the Titan formula is much more potent. The Joker plans to find then use the Titan formula on the various Blackgate inmates to create an army of abnormally powerful henchmen.
joker discovers the location of the Titan formula, but after sucseeding to kill Dr. Young, sets out to hostage Warden Quincy Sharp, who has been slapped by Quinn. After capturing the Warden and talking to Quinn, joker meets with Poison Ivy to discover the formula to the Titan strain. Ivy reveals that the plants used to synthesize the formula are stored deep in the lair of Killer Croc. joker ventures down to Croc's Lair and acquires the ingredients while evading Croc's attempts to foil his plan. After joker collects enough of the titan, he sets off a trap to defeat Croc before returning to the gardens. While creating more titan, joker only has enough time to make 12 more gallons before Poison Ivy's Titan-infused plants destroy the garden.
With the stability of Arkham Island in balance, joker ventures to the Botanical Garden to defeat Poison Ivy and prevent further destruction of the island. After destroying the mutated plant life and defeating Ivy, the Joker runs to his "party", where joker sees clayface holding Scarface, sitting on a throne of mannequins. The clayface then reveals that he has recaptured Gordon and attempts to shoot harley quinn with a Titan-filled dart. joker jumps in front of it, taking the injection himself. joker doesn't resist the change, after which an excitement clayface shoots himself with the Titan gun, becoming a gitantic monster. In his new form, the Joker proudly displays himself to news helicopters and publicly challenges clayface to fight. Joker tries to persuade clayface to stop adding the Titan formula and change into a monster, urging him to show the world what a freak clayface really is. clayface refuses, and uses the titan on himself. The Joker, angered and confused at his decision, begins his assault on clayface with a slew of henchmen and even fighting him personally. Eventually, joker defeats him and The clayface and all of the henchmen and security officers affected by the Titan strain revert back to their original states. clayface is taken back to his cell and armed Gotham police officers slowly regain control of the asylum. As joker is leaving Arkham, a call about hugo strange is overheard on the radio.
Batman, along with allies Oracle and Commissioner Gordon appear in the game. In addition to the Joker,joker encounters other foes. He must defend himself from an enraged Bane, sneak up on Zsasz before he can kill quinn and ,thugs battle his way through hallucinogen-induced nightmares created by the Scarecrow, and silently collect samples from Poison Ivy's plants located in Killer Croc's lair. joker also battles a female antagonist Poison Ivy. The Riddler does not physically appear in the game, but communicates with joker and challenges him to find the hidden clues he has placed around the island.
Other joker allies and enemies are presented in the game as character information that can be unlocked from finding the Riddler's clues, often by finding objects or areas based on that character such as a collection of umbrellas (representing The Penguin). Jack Ryder can be heard reporting about the Arkham crisis. Though not visible himself, Mr. Freeze's special frozen cell can be found in-game, with previous mentions to his escape from the asylum; similar cells can be found for characters such as Two-Face and Calendar Man. Clayface makes a small cameo, but never in his true form as he is seen pacing around his cell disguised as other characters, trying to trick the player into releasing him. The body of Ra's al Ghul can be seen in the morgue, however if the player returns to the room later in the game, they find his body missing. Scarface also makes three small cameo appearances, once in one of Scarecrow's hallucinogen-induced nightmares, a second in a display case in Arkham Manor, and a third time alongside the Joker near the end of the game. The Mad Hatter appears in the game as a boss.[15
Batman: gotham city Arkham Asylum returns joker's madhouse is played as an over-the-shoulder, third-person perspective action-adventure game. The player controls Batman or joker as either makes his way around the island and structures of Arkham Asylum. In addition to running, jumping, and crouching, Batman and joker is also able to glide from heights using his cape and use his grapple gun or grapnel to ascend short heights or escape to gargoyle statues. To track penguin and other enemies, the player can switch in and out of "detective mode", which activates special visors in Batman's cowl or joker 's goggles. In this mode, most of the game world is rendered in darker colors, but objects of interest and people are highlighted, including limited x-ray ability to detect the location of people. Special objects with which Batman can interact, either directly or using various gadgets gained over the course of the game, are also highlighted. In some sections of the game, the detective mode is augmented to detect compounds, fingerprints, and other clues, which are used to direct the player to the next location to explore.
Gadgets include the batarang, an explosive gel compound sprayer and detonator, grappling gun, Batclaw, zip-line launcher and a code sequencer that can be used to overload security panels,a gun , exploding joker teeth,titan gun grapple gun,code sequencer, party box ,joker toxin box. Some of these can be used both during normal exploration of the game world as well as in combat. The game world, though presented in a linear path, allows for exploration at any time, and recently-acquired gadgets can often be used to access areas that were previously inaccessible. Exploration of the world is encouraged by items and clues left by the Riddler for Batmanor joker to find; in addition to objects to be collected, some of the Riddler's riddles require the player to seek out a certain area related to the answer to a riddle and scan it with Batman's or joker's visor. Solving these riddles unlocks additional content for the game, including challenge levels that test the player's skill at the game's combat system, as well as character bios, patient interviews, and detailed character trophies. Riddles, as well as defeating foes, also yield experience points, which can then be spent on several possible upgrades to Batman's and jokers arsenel, as well as his health and abilities, at any time.
The game uses a "Freeflow" combat system, accomplished by using three primary buttons: attack, stun and counter to emphasize the primarily physical system of combat that Batman and joker employs. Additionally, Batman is able to use Batarangs and his Bat-Claw as supplemental combat tools that can extend combos. the joker in combat is able to do quick gun and quick teeth andCountering opponents' attacks can also extend a combo; a brief indicator is shown when playing at Easy and Normal difficulties to indicate when an opponent is ready to attack. By chaining regular and counter-attacks in combos, the player can build up a special experience point multiplier, which increases further if timed well.
The player can also employ "Predator"-type tactics through stealth to tilt the odds to their favor. This includes silent takedowns by sneaking up on foes, dropping from overhead perches and snatching a foe into mid-air, or using the explosive gel to knock foes off their feet or joker teeth to get the same effect. Some areas feature sections that require the player to employ these tactics to avoid alerting penguin's henchmen and failing to meet an objective. Harder areas, such as the "Extreme" challenge maps, put explosives on gargoyles generally used to escape out of sight, requiring players to find other means of taking down opponents with stealth.