Matthew Armstrong, creator and franchise director of the first-person shooter series Borderlands, has left his position at developer Gearbox Software.

Armstrong announced the news on Twitter. "Things changed," he said. "No longer working at @GearboxSoftware. I will always love Gearbox, but it's adventure time."

Armstrong told Game Informer that he's not quitting out of anger and that he wasn't fired. Instead, Armstrong explained that now that Borderlands: The Pre-Sequel, the Claptastic Voyage DLC, and Borderlands: The Handsome Collection have all shipped, he found a rare moment where he was "temporarily non-vital," and decided to leave.

"It's just time for new adventures," he said. "I'm an inventor. I'm ready to make something new. Not just new to me, but new to everyone."

Armstrong didn't say where he was headed next.

In February, Gearbox announced that is ready to start working on and is already recruiting a team for the next Borderlands game, which is being made specifically for the Xbox One and PlayStation 4 (and PC, presumably).

Earlier this week, we found out that Borderlands: The Pre-Sequel developer 2K Australia is shutting down, letting go of all of its employees.