Dark Souls (previously known as Project Dark), is likely to have you cursing the developers and throwing controllers, as it's going to be a difficult game. Even more difficult than the predecessor Demon's Souls - a game known for its punishing difficulty level.
Famitsu writes: "The difficulty has been increased greatly over Demon's Souls," and they also list a few other changes made.
There will be no connection between Demon's Souls and Dark Souls when it comes to story or environments. We will explore the world in a slightly different way as the levels are connected to each other and not through a central hub world. Dark Souls also does away with classes and we will have more spells and items at our disposal.