The Mass Effect Limited Collector's Edition' was offered through participating retailers. It included the following bonus materials: * A Mass Effect fiction book titled "Galactic Codex: Essentials Edition 2183"A 36-page guide to the Mass Effect universe, including a Citadel timeline and a guide to all non-human races, biotics and the key locations in the Perseus arm of the galaxy * An additional Mass Effect art book titled "A Future Imagined"A 36-page collection of BioWare's concept art for the game * A bonus DVD of exclusive Mass Effect background material and additional content including: * "The Vision of Mass Effect" documentary * "The Making of Mass Effect" documentary * "Interactive Storytelling" documentary * "Inside BioWare" documentary * 18 Mass Effect