Game designer Cliff Bleszinski, co-founder of Boss Key Productions and a major force behind the development of the Gears of War franchise, is stepping back from games to focus on himself and his family.

In a statement posted to Twitter this afternoon, Bleszinski said that Boss Key “is effectively no more.

“Four years ago I set out to make a world class video game studio and I hired some of the best talent in the videogame industry,” he wrote. “They worked tirelessly to produce quality products and, while we had our ups and downs, I’d like to think we had fun doing it. LawBreakers was a great game that unfortunately failed to gain traction, and, in a last ditch attempt we scrambled to do our take on the huge battle royale genre with Radical Heights which was well received, however, it was too little too late.”

Bleszinski continued to say he planned on stepping back from development for a time to spend more energy on his family and a sick pet.

“Videogames will forever be a part of who I am and I hope to make something new again someday,” he said. “However, I need to withdraw and take this time.”

Boss Key created the high-concept multiplayer shooter LawBreakers, which was poorly received and ultimately wound down. In April, the team transitioned to Radical Heights, a free-to-play survival shooter, that made interesting design choices in an already crowded space, including games such as Fortnite and PlayerUnknown’s Battlegrounds.

The last substantive Tweet from the Boss Key Twitter account was six days ago. Although the studio is winding down, the servers for Radical Heights will “remain up for the near future,” according to Bleszinski. We’ve reached out to that team for more details.