Batman: Arkham Knight's first story-based DLC has been given a July 14 release date by Warner Bros, with the publisher also explaining how the expansion will focus on the Batgirl character.

The add-on, entitled Batgirl: A Matter of Family, will cost $6.99 in North America and £5.80 in the UK. Those who purchased an Arkham Knight season pass will not have to pay an additional fee.

Warner Bros has only announced plans for the PlayStation 4 and Xbox One editions of the expansion, and has not discussed a PC version.

This omission comes in the wake of a punishing two weeks for the publisher, and the game's developer Rocksteady, with a litany of bugs discovered in the PC version. After apologising and announcing its intention to build a patch to fix the numerous problems, Warner decided to pull the title from Steam.

Most recently, Warner Bros was accused to have known about Arkham Knight's PC Problems "for months", however these claims--purportedly from internal QA employees--are not proven.

Set prior to the events in the first game in Rocksteady's Batman trilogy, this add-on will place Batgirl in a new location with multiple missions, side quests, and secrets. Featured within the game is a new hacking feature, as well as Dual Play functionality with Robin.