From eGamer: This is what you get when you hunt for achievements. Masochism in its purist form. When I first got Halo Reach and saw that there was an achievement for completing Legendary difficulty alone, I just decided to go for it on my first run through. And boy did I suffer. If I had to give an accurate description of how it felt it would be this: Butt sex with a man who ate glass his entire life and now his anal passage is filled with razor sharp shards of glass. The more you push, the more your manhood gets torn to pieces. It was that bad.
i only did it once alone on legendary
its the hardest game I've ever beat
a distant second was COD4 on Veteran (including the mile high club)
Reach is hell
but i had to beat it alone in legendary
it was haunting my dreams
cmon man
you dont compare an RPG with a FPS
The difficulty of a game like Demon's Souls requires intellect precision, and some trial and error.
You shouldn't really compare them.
Btw, Demon's Souls isn't on Xbox... -_- Maybe you meant Dark Souls?..