More details about the "Harley Quinn" DLC for the upcoming action-adventure video game "Batman: Arkham Knight" has been mined, thanks to an updated Amazon listing. The story pack and another that's centered on Red Hood are for the taking for free to those who pre-order the game. 

While that is very well-known, the gaming community's knowledge of what Harley Quinn has in store has just been renewed.

"For the first time in the Arkham series take on the role of Joker's psychotic side-kick Harley Quinn and wreak havoc inside the Blüdhaven Police Department," the description posted by Amazon reads.

"With this exclusive Story Pack experience events in the lead-up to Arkham Knight as you infiltrate Blüdhaven to rescue your partner in crime: Poison Ivy. Delve deep into Harley's demented nature and utilize her devastating baseball bat to smash, crash and bash your way to a friend very much in need," it further described the downloadable content.

It looks like the DLC is a pre-order exclusive to Amazon, too. It promises unique weapons, gadgets and abilities as well as four exclusive challenge maps. All it takes is $59.99 for gamers to play as the psychotic supervillain. To pre-order "Batman: Arkham Knight" and score two DLC packs for free, head over here. 

"Batman: Arkham Knight" serves as the culmination of the well-loved trilogy based on the crimefighting adventures of the Caped Crusader. There is a better gameplay system that will allow players to comb through every lane and watch over Gotham City for bad guys from the sky. 

Players can get a load of cool weapons and a highly-developed Batmobile packed with killer gadgets to save Gotham City from Scarecrow and a band of baddies composed of Penguin, Two-Face and Harley Quinn raring to make their vendetta felt by the Dark Knight.  

The forthcoming title will land on the PS4, Xbox One and PC on June 2.