Microsoft Games Studios Europe creative director Peter Molyneux has told OXM that the reason Natal is "challenging" to develop for is down to the fact "it's so different".
"For me, Natal is challenging because it's so different," the Lionhead boss revealed in a video interview with the mag on Inside Xbox.
"It's very, very different to any input other mechanism the world has even seen before because there isn't any buttons and that's both its strength and its big challenge. So when you've got a game like Fable, there is an enormous number of things we can do with Natal."
Molyneux later added in the interview: ""But what I didn't want, I wanted for you to feel like you were part of the world. I didn't want you to go off and play some mini-game totally outside the world of Fable.
"I wanted you to feel like Natal was integrated into the world, if you like. It enhances the world, if you like. It's going to be integrated in so it has a purpose, and it gives you something, and there's a reason to do it."
Fable III's out by the end of the year, while Natal's due by Christmas.