The co-head of Blizzard, Jen Oneal, is leaving the role after less than three months.

In a post on the company's website, Oneal said that she was stepping down from this position into another role at the games giant before leaving Activision Blizzard at the end of the year. This leaves her colleague Mike Ybarra as the sole chief of Blizzard.

She says that, having spoken to many people at the company and that she believes she can do more to champion diversity within the games industry in another role.

Oneal also said that she has asked Activision Blizzard to create a $1 million grant to Women in Games International, of which she is a board member.

"With my remaining time here, I will be transferring my responsibilities to Mike, and transitioning into a new role working closely with Activision Blizzard and WIGI to determine the first steps around how the grant will be utilized, and its structure," Oneal wrote.

"The partnership is full of potential and is another step in a long-term commitment to create better support, resources, and guidance to women in the gaming industry.

"I wanted to tell the Blizzard community this personally because I want you to know I believe so strongly in Mike and the rest of Blizzard’s leadership both in terms of Blizzard’s culture and Blizzard’s games. Blizzard’s best days are ahead. I truly believe that. I also am hoping this letter helps you to think about what you can do to make everyone around you--no matter their gender, race, or identity--feel welcome, comfortable, and free to be themselves."

Jen Oneal, alongside Mike Ybarra, was promoted to co-head of Blizzard in August of this year following the departure of president J. Allen Brack. He left the company in the wake of a California Department of Fair Employment and Housing lawsuit against Activision Blizzard detailing a toxic working culture, with Brack being one of two people directly named.