Joker, Penguin, and Riddler battle over control of the city, until finally deciding to settle their differences by giving all of Gotham over to whoever is able to capture and discover the true identity of the Batman.

Hugo Strange creates a AI database called DAVE (Digitally Advanced Villain Emulator), encoded with the minds of Gotham's greatest criminals, in order to better predict their crimes. However, DAVE breaks free and proclaims himself to be "Gotham's ultimate criminal mastermind".

The Joker decides to take on the role of "Batman" and doses Bruce with Joker venom to create an arch-rival of his own.

Joker takes Detective Yin hostage, but once captured he refuses to tell of her whereabouts. Convinced it's the only way to learn Yin's location before she meets her demise, Batman uses a device created by Professor Hugo Strange to enter the bizarre brain of the Joker in search of an answer.

A mysterious villain known as the Riddler challenges Yin, secretly helped by Batman, to a number of riddles. Things are not what they seem from the riddles...

Ethan Bennett is captured and put on trial for his crimes as Clayface. He's released on probation but he may find the temptations of a criminal life too great.

Joker pirates the airwaves of Gotham in order to broadcast his crimes on TV as entertainment. When Detective Yin's overzealous new partner tries to bring the clown prince of crime down, he merely becomes Joker's latest "co-star." Batman must find where Joker is broadcasting from before he can carry out his plan to make Gotham die of laughter!

The story of how the Commissioner's daughter became Batgirl and how her best friend becomes Poision Ivy is told.

Inspired by the Batman/Batgirl partnership, the Joker decides to recruit his own sidekick and gain a partner in crime.

Ragdoll, a triple-jointed contortionist, crosses paths with Batman and Catwoman while continuously trying to steal priceless artifacts. Also, Selina Kyle befriends Bruce Wayne ... but what are her intentions?

Continuing where we left off in the first part, Barbara Gordon becomes Batgirl in order to save the commissioner, but does Batman really want a sidekick?

The Penguin, Mr. Freeze, and Alfred's old school chum are all on the trail of a sunken treasure in Gotham Harbor.

Batman battles a criminal called Bane, who uses steroids to enhance his strength.

During a museum robbery, a partnership is formed between Catwoman and Penguin. But when Penguin double-crosses Catwoman before she can double-cross him, she and Batman have to stop Penguin before he unleashes his true plan: harnessing the power of Ra!

Solomon Grundy, a legendary zombie, emerges from a swamp on Halloween to wreak havoc on Gotham. But Batman and Alfred discover that there is more to Grundy than there appears.

Maximillian Zeus, a millionaire who is also a Greek history fanatic, takes control of Gotham from the sky after losing to Mayor Grange in a re-election.

When the Batman takes a blow to the head during a fight with the Penguin, Gotham is left without its defender while an amnesiac Bruce Wayne must consider if he's a coward or not.

Firefly and Mr. Freeze team up to put their devastating plan into action: permanently putting Gotham City in a never-ending winter. Once the policeman's gala charity ball is put on ice, it's all up to the Batman.

The Joker is on a rampage when he gets hold of Bane's injection system and turns himself into a rampaging beast.

When a rare Black Siberian Leopard is stolen, Batman and Batgirl suspect Catwoman and go to protect the second Black Siberian Leopard. But what happens when Joker beats them to the punch and brings the cats to Killgore Steed? It's a maze of doom with dangerous creatures. Can Catwoman, Batman, and Batgirl escape, or will they end up on Joker's wall?

Batman must rescue Alfred from the clutches of the Penguin.

Catwoman hunts for Batman and steals his utility belt.

Batman searches for diamond thief Mr. Freeze.

Killer Croc, a half-man, half reptile plans to submerge all of Gotham in water in order to facilitate his plundering of the city.

Spellbinder, a three-eyed mystic with the ability to induce both hypnosis and visions employs the servants of the rich to steal the Eye of Sarkana -- including Alfred!