Batman: Arkham Knight developer Rocksteady has offered a few more details about the game's villains, like The Penguin, Two Face, or The Riddler and how they've been enhanced over previous experiences like Arkham City.

Batman: Arkham Knight is the fourth installment in the really popular Arkham series, and developer Rocksteady has already shared quite a lot of info with fans since the official debut a few weeks ago.

After hearing that we'll get to see a new and improved version of the Caped Crusader, not to mention his all-new Batmobile, Rocksteady has gone in depth about the various villains that will be present in the game's story.

Quite a few returning baddies are included in Arkham Knight, many already seen in Arkham City, for example, like The Penguin, The Riddler, or Two Face.

Some of the studio's staff have discussed with GameInformer the amount of design work that went into the characters, as Rocksteady didn't want to rest on its laurels and bring back the same versions of the villains.

The Penguin had the most work done, as the British team wanted to make the character truly disgusting and repulsive so that players have an extra incentive to bring him to justice.

"In Arkham City, [Penguin's] a collector. He works out of a museum and he looks like he's in the mafia. This time, we went for autumnal mafia," lead character artist Albert Feliu said. "We took the coat off, and the concept of Penguin was more of a dirty dude. Obviously his shirt is rolled up and sweaty, and he has food stains on it. But still, he's really powerful."

"He's got a golden chain, as well. We had to be a bit crazy with this character, and working with his design. And we shaved his head. He's proper filthy, you know. It makes you want to punch him even more."

Two Face, on the other hand, already had a good design, so Rocksteady just wanted to remodel him with improved effects for his burned side and to take advantage of the power of new platforms like PS4, Xbox One, or PC.

"With Two Face, we thought he was a really strong character already," Feliu said. "We just rolled up his sleeves and made him look really next-gen. We took some references of really filthy, burnt flesh - which is what we do most of the time, which is quite cool - and tried to make him look as badass as we could."

The Riddler will be much more present in Arkham Knight than in previous games, as Edward Nigma will slowly evolve during the adventures of the game in terms of design, becoming more and more disorganized as Batman figures out his plan.

Batman: Arkham Knight will debut this fall for PC, PS4, and Xbox One.