Marty O'Donnell, the composer behind the Halo series and the upcoming Destiny, says he has been let go from Bungie. The studio itself later confirmed the termination and released a statement to wish him well.

In a post on his personal Twitter (via Polygon), O'Donnell said, "I'm saddened to say that Bungie's board of directors terminated me without cause on April 11, 2014."

Bungie subsequently issued its own statement on the official site.

“For more than a decade, Marty O’Donnell filled our worlds with unforgettable sounds and soundtracks, and left an indelible mark on our fans,” it reads. “Today, as friends, we say goodbye. We know that wherever his journey takes him, he will always have a bright and hopeful future. We wish him luck in all his future endeavors.”

O’Donnell has been working at Bungie since 2000, and was instrumental in creating music for the Halo series. His work will still be heard in Destiny, due out this year.