I've had Demon's Souls for a while actually, I've been playing it more lately than I had before. I'll be getting Dark Souls when it comes out as well, it has the title of "Berserk the game" for a good reason. The game is fucking hard and unforgiving though, when you die you lose all your souls(used as exp and currency) which you can get back if you found where you died before dying again, turn into a soul form with half HP, and the entire area resets so everything is respawned. It's very trial and error based. You can go back into your full HP human form after every boss you kill and with certain items. I have an image comparing stuff in the game to stuff in Berserk somewhere... I'll have to find it.