Blockbuster is a member of the Children of Arkham and right hand man of the Penguin.
Biography
Roland Desmond's history before joining the Children of Arkham is currently unknown. He may have been the descendant of someone unlawfully committed to the asylum or the subject of experimentation at the asylum. His blue skin suggests the latter and that he may have been injected with the same psychogenic chemical used by Thomas Wayne, Carmine Falcone and Hamilton Hill to commit people unlawfully to Arkham. By the time of the game's storyline, he had joined the organization and worked as the Oswald Cobblepot/the Penguin's right hand man. He also took on the alias "Blockbuster", possibly due to his immense strength.
Episode Two: Children of Arkham
Blockbuster was first confronted by Batman in the Skyline Club, as Penguin and his men raided the former criminal club. Whilst his boss conversed with the vigilante, Roland and the other men stood by, ready to fight him if things got violent. Whilst Penguin left to track down Selina Kyle, Blockbuster fought with Batman and threw him out of the hole, which had been created during a fight between the latter and Carmine Falcone. When Batman returned moments later, Penguin, Blockbuster and their men had disappeared.
Blockbuster later appeared at the Children of Arkham's raid on the Mayoral debate between Hamilton Hill and Harvey Dent. He, whist backstage, took Vicki Vale out to "host" the event and guarded the room from GCPD officers. When they tried to raid the theater, Blockbuster easily overpowered them and, upon realizing that Batman was attacking Penguin and the other members, attacked the vigilante. He managed to overpower him and easily destroy one of his drones, even damaging part of his cowl. However, he was finally subdued when he was beaten down by Batman with a Bat-Stunner. He, along with other Children of Arkham members, were arrested when the GCPD appeared at the scene.
Episode Four: Guardian of Gotham
Following his fight with Batman, Desmond was left in a fractured state, unable to perform the most basic of functions or respond to verbal communication. He was transferred to Arkham Asylum, where he was constantly monitored by orderlies. During a fight between Victor Zsasz and other members of staff, he could do nothing but stand by and watch.
Episode Five: City of Light
Desmond was among the Arkham inmates freed during the Children of Arkham's attack, but was not involved in any of the riot that took place. Instead, he would play with his cell door and was briefly seen by Batman as he chased Lady Arkham through the Asylum. Desmond was returned to his cell by the GCPD and Arkham Staff, along with the other inmates.