I think Demon's Souls changed a lot of things at Atlus. While it's an eastern developed title, it felt a lot like a western title. After its success, we're now starting to see Divinity II: The Dragon Knight Saga, The Cursed Crusade, etc. And Demon's Souls came with an art book and soundtrack as well. They just recently re-released both items with the Greatest Hits version of Demon's Souls:
http://www.amazon.com/Demons-Souls-..._4?ie=UTF8&qid=1298173253&sr=8-4