Treyarch has announced that Jason Blundell has left Treyarch in a statement posted on Twitter.

He said that he decided to move on from the studio recently as the company moves forward to build Call of Duty 2020.

“After thirteen fantastic, action-packed years, I am moving on from Treyarch,” Blundell says in a statement on Twitter. “The team at Treyarch has been nothing short of awesome – thank you! And thank you to the fans for giving me the opportunity to bring life to the undead in so many wonderful ways, the honor has been all mine!”

Here is Blundell’s full statement:

After thirteen fantastic, action-packed years, I am moving on from Treyarch. During my time at the studio, I’ve been privileged to work on a variety of projects, wearing many hats along the way, with my time on the Zombies team proving to be quite special. It’s a team comprised of some of the most creative and talented developers in the industry, many of whom you never see because they’re behind the scenes shaping the direction of each experience.

Clearly, I’d be remiss if I didn’t personally thank the group that continues to make it all worth it: the Zombies community! Your passion, enthusiasm — and frankly, your craziness — has been a continued source of inspiration. The beauty of Zombies is that it has always been about the interaction between us as developers and one of the most passionate player communities on the planet. These are memories I will cherish for a lifetime.

The team at Treyarch has been nothing short of awesome — thank you! And thank you to the fans for giving me the opportunity to bring life to the undead in so many wonderful ways, the honor has been all mine!

He has not stated what he will be doing next, and the statement also does not hint at what’s happening with Zombies at the studio.

Treyarch is reportedly at the lead of the 2020 Call of Duty game with Sledgehammer Games, but details on the title has not been announced. It’s not clear if the game will have Zombies mode or not.