Founder of Massive Entertainment, Martin Walfiz, has left the studio and its parent company Ubisoft.
The publisher confirmed the departure to GamesIndustry.biz this morning, but would not offer any reason for the move.
"Ubisoft is saddened by the recent departure of Martin Walfiz from Massive Entertainment and we wish him all the best in his future projects," said the company.
Ubisoft swooped for Massive Entertainment in November of last year, after Activision Blizzard put the studio up for sale as part of a wider streamlining initiative. It's expected that the real-time strategy developer is concentrating on the online space and will help Ubisoft take its first steps in the MMO market.
Massive was founded in 1997 and employs around 120 staff in Malmo, Sweden. As well as the World in Conflict series, Massive created acclaimed PC franchise Ground Control.