GameSpy's "engine week" rolls on, with today's interview with BioWare's Dr. Ray Muzyka and Dr. Greg Zeshuk, talking to them about their various engines, and their features and benefits. The company has three engines: the Infinity Engine (used in Baldur's Gate), the Omen Engine (used in MDK2), and a third, currently unannounced engine that is being developed for use in their upcoming multiplayer RPG Neverwinter Nights.