GDC organizers have announced three new sessions for GDC 2013. The first is a production track session from Epic Games called “Building Epic Worlds through the Strengths of Artsourcing” hosted by Epic producer Chris Mielke. The second talk announced is a design session track called “The Self, Presence and Storytelling” which will be given by Frictional Game’s Thomas Grip. Finally, and audio track session titled “Crossing the Streams: Game Audio Rule Breakers of the Past Decade” will be presented by Microsoft’s Scott Selfon. GDC 2013 takes place March 25 – 29 at the Moscone Center in San Francisco.