Microsoft Game Studios has released a new trailer from Mass Effect, the science-fiction action and role-playing game developed by Bioware and due to ship in North America on November 20, 2007 and three days later in Europe. Developed exclusively for Xbox 360, Mass Effect features a rich, engaging story line with morally complex decisions, real-time, squad-based combat, character customization and deep role-playing systems, customizable weapons and vehicles, credible digital actors, and more.