Bane

A brilliant military mind and strategist, Bane was denied any hope for a normal life when he was forced to rot away within a foreign prison as a child for a crime his father committed. Since his father died before his sentence was completed, Bane was forced to take his place in the prison, where he was subjected to military experiments.

Among these experiments came Bane's dependence on the chemical agent, Venom, which granted him incredible strength and adrenaline. Breaking out of the prison, Bane sought to conquer worthy adversaries and make a criminal empire for himself. It wasn't long until he heard legends of Gotham City's Dark Knight and fought the hero numerous times in an effort to prove himself, only to be defeated and arrested time and time again.

Road to Arkham
At some point, Bane was captured and quietly brought to Arkham Asylum so that Dr. Penelope Young could study him and the effects of Venom on the human body, so that she could design a more powerful variant of the formula known as Titan. When discussing the Titan Project in public, Bane's involvement was kept secret, and he was referred to only as "Patient X." Officially, Bane was listed as an escapee from Blackgate Prison.

Just before the Joker's takeover of the asylum, Harley Quinn made her way to Bane's room and sedated him in order to keep him quiet when the "visitors" arrive.

Batman: Arkham Asylum
The Joker had Commissioner Gordon kidnapped and taken to the Medical Center where Bane was being held, drained of Venom and left withered and helpless. After rescuing Gordon, Batman entered Bane's holding room. Bane begged Batman to cut him down, in hopes of getting revenge on Dr. Young, but before he could do so, the Joker activated Bane's chemical storage tank, infusing him with the Titan strain of the Venom formula, returning his immense strength to him. Bane then attacked Batman and threw him through a wall into the Boiler Room. Bane and Batman battled it out with the interference of the Joker's goons.

Eventually, Batman cut Bane's Venom supply as the room collapsed upon itself. Batman escaped through a manhole to the surface where he reunited with Gordon. Bane managed to reattach his main valve and smashed his way to the surface, grabbing a hold of Batman and claiming that after he "breaks" Batman, the "bruja" (Dr. Young) would be next. Batman then summoned the Batmobile by remote control to their position and kicked Bane in its path. The Batmobile crashed into Bane, hurling him into the sea. In one of the three post-credits scenes, Bane emerges from the water by the docks and grabs onto a floating case of Titan.