Overlord adds five new areas and two new achievements to Bioware's epic RPG. The content will be released in June for 560 Microsoft Points on Xbox Live, and on PC for 560 BioWare points.

Players will follow Commander Shepard and his crew as they investigate a research base overrun by Geth troopers and the dangerous VI Overlord hybrid, an experiment that fused a human being with virtual intelligence. Shepard must shut VI Overlord down before it causes havoc throughout the galaxy.

Mass Effect 2's executive producer, Kasey Hudson, tells us more.