Calling it "without a doubt the most difficult decision of [his] career," BioWare executive producer Casey Hudson announced today that he is leaving the EA-owned developer. Hudson is best known for his work as the director of the original Mass Effect trilogy and Star Wars: Knights of the Old Republic.

The news was revealed in a post on BioWare's blog this afternoon. Hudson had been with the company for almost 16 years, having started as a technical artist on MDK2 and Neverwinter Nights. Most recently, he and BioWare Edmonton had been working on a new IP which was teased at E3 in June. Hudson said at the time the game will tell "contemporary stories."

"Though there's never an easy time to make a change like this, I believe this is the best time for it," Hudson says in a letter about his departure. "The foundation of our new IP in Edmonton is complete, and the team is ready to move forward into pre-production on a title that I think will redefine interactive entertainment.

"Development for the next Mass Effect game is well underway, with stunning assets and playable builds that prove the team is ready to deliver the best Mass Effect experience to date. And the Dragon Age: Inquisition team is putting the final touches on a truly ambitious title with some of the most beautiful visuals I've seen in a game."

Hudson says he will "take a much-needed break" before deciding what to do next, suggesting he doesn't have an exact role or project he's leaving to work on.

BioWare GM Aaryn Flynn said on behalf of the studio that it thanks Hudson "for his hard work and dedication as we look back on his time with BioWare."

We've contacted EA for more details and to find out who will be assuming Hudson's role moving forward. We'll report back with anything we learn.