One of Guerilla's co-founders and its technical director Arjan Brussee has left the company to join EA studio Visceral Games, where he'll take the role of executive director.
"The folks at Guerrilla are absolutely world class and can now only pick up further," he told Dutch site Control Online.
The site also printed Brussee's farewell email to his Guerrilla colleagues.
"It has been a great ride. Every year there was something ambitious, new and inspiring to put my energy into. For me, I now want to find a new personal challenge, which I hope to find at EA HQ near SF, CA and who knows where this will take me next."
Visceral is the studio behind the Dead Space series, as well as Dante's Inferno.
As well as founding Guerrilla in 2003 and launching the Killzone franchise, Brussee has worked with Lost Boys Games, Orange Games, and Epic.