With the launch of Call of Duty Black Ops this fall, Activision’s other combat game studio, Treyarch, is stepping into the spotlight. Treyarch has more than 300 people working on the game which releases on Nov. 9 and is the latest in a series that has generated more than $3 billion in sales. In the past, Treyarch was overshadowed by Infinity Ward game studio, which launched Modern Warfare 2, the most successful game in history, in November. Infinity Ward has lost its leadership in a nasty battle with the parent company, and so now Treyarch has to prove that Call of Duty still has legs. We talked with Mark Lamia, studio head of Treyarch, about this challenge. Here’s a transcript of our interview.