Realistic Games has announced the resignation of chief executive Andy Harris.

The company said that Harris tendered his resignation last month and will step down as chief executive with immediate effect, although he will remain with the business for a transitional period to assist in the handover to a new chief executive.

The reason for his departure was not disclosed by the company, whose directors said that they "understand and support" his decision. They also thanked him for his "commitment, passion, and dedicated service to the business."

Founding director Andy Cattrell  commented: "I would like to thank Andy for his instrumental role in driving the growth of Realistic. It is disappointing for us to lose someone of his calibre, but he leaves the business in great shape, with a capable and talented team ready to meet the challenges ahead."

Formerly Ladbrokes' director of gaming, Harris spent more than six years with Realistic, initially serving as a consultant to the business before being appointed commercial director in 2012. He then stepped up to the CEO role in April last year.

"It has been an honour to be at the helm of Realistic Games and I am confident that the company will continue to do what it has always done best: deliver innovative and market leading content to players, supported by first-class service to its operating partners," Harris said.