The founders of Rocksteady, Sefton Hill and Jamie Walker, are leaving the studio.

The news was unveiled in a letter by Warner Bros games boss David Haddad, who said that the duo was departing the developer at the end of the year to start "a new adventure in gaming".

Production directors Nathan Burlow and Darius Sadeghian are being promoted to studio director and studio production director respectively.

“Our decision to leave Rocksteady was emotional to say the least," Sefton and Hill wrote.

"From the day we founded the company in 2004 all the way to today, Rocksteady has been our life and soul. It has given us the opportunity to do what we love most: make great games with exceptionally talented people. We are so proud of the team here for the games we have all made together, from our first game Urban Chaos, to the much-loved Arkham series, and now the epic Suicide Squad.

"But there is something extra special about Rocksteady that goes beyond the games we make, and everyone who works here feels it. It’s the incredible moments that we've shared over the years, the friendships made, and the care this team has for each other that have made this unforgettable journey so special. We believe people wear their Rocksteady T-shirts with pride because of how we treat each other and how it feels to be here. We want to thank the team for their hard work and everything they bring to make this such a great place to be."

Burlow added: “Having worked with Jamie and Sefton as one of the founding members of the studio, I want to thank them for creating what I consider to be one of the best games development studios in the industry. It’s been an absolute pleasure to work alongside them and I wish them all the very best in the future. I am very passionate and honored for the opportunity to continue the leadership of Rocksteady with Darius. My goal is to support our talented, hardworking team, retaining the heart and amazing culture of the studio. We are looking forward to building upon our successes with the upcoming release of Suicide Squad: Kill the Justice League and our future games.”

Rocksteady is best known for its Batman Arkham games. In 2020, it was reported that there was a culture of misconduct at the studio, with ten women who worked there at the time co-signing a letter detailing their poor treatment.